The most common and most likely answer to this crossword clue is the 7 letter word ROLLING
I've seen this crossword clue in Independent
R
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L
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More clues leading to the result ROLLING
- Staggeringly wealthy?
- On the beat, Pat misses being rich
- Heaving pub expends its last gallon after large Latin men returned
- Very rich and very drunk?
- Call about oxygen lines being subject to regular review
- Turn up, finally coming with lots of cash
- Wealthy drunk
- Travelling around with fifty pounds in toll
- Rich sort of cake popular — great for starter
Buddy explains!

The straight part
We know that "rich" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case rich = rolling.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does ROLLING mean?
ROLLING verb- To cause to revolve by turning over and over; to move by turning on an axis; to impel forward by causing to turn over and over on a supporting surface.
- To turn over and over.
- To tumble in gymnastics; to do a somersault.
- To wrap (something) round on itself; to form into a spherical or cylindrical body by causing to turn over and over.
- To bind or involve by winding, as in a bandage; to enwrap; often with up.
- To be wound or formed into a cylinder or ball.
- To drive or impel forward with an easy motion, as of rolling.
- To utter copiously, especially with sounding words; to utter with a deep sound; — often with forth, or out.
- To press or level with a roller; to spread or form with a roll, roller, or rollers.
- To spread itself under a roller or rolling-pin.
- To move, or cause to be moved, upon, or by means of, rollers or small wheels.
- To leave or begin a journey.
- To compete, especially with vigor.
- To beat with rapid, continuous strokes, as a drum; to sound a roll upon.
- To apply (one line or surface) to another without slipping; to bring all the parts of (one line or surface) into successive contact with another, in such a manner that at every instant the parts that have been in contact are equal.
- To turn over in one's mind; to revolve.
- To behave in a certain way; to adopt a general disposition toward a situation.
- To throw dice.
- To roll dice such that they form a given pattern or total.
- To create a new character in a role-playing game, especially by using dice to determine properties.
- To generate a random number.
- (of a vessel) To rotate on its fore-and-aft axis, causing its sides to go up and down. Compare with pitch.
- (in folk songs) To travel by sailing.
- To beat up; to attack and cause physical damage to.
- To cause to betray secrets or to testify for the prosecution.
- To betray secrets.
- To be under the influence of MDMA (a psychedelic stimulant, also known as ecstasy).
- (of a camera) To (cause to) film.
- To slip past (a defender) with the ball.
- To have a rolling aspect.
- To perform a periodical revolution; to move onward as with a revolution.
- To move, like waves or billows, with alternate swell and depression.
- To move and cause an effect on someone
- To make a loud or heavy rumbling noise.
- To utter with an alveolar trill.
- To enrobe in toilet-paper (as a prank or spectacle).
- To create a customized version of.
- To engage in sparring in the context of jujitsu or other grappling disciplines.
- The act by which something is rolled.
- Drunk; intoxicated from alcohol, staggering.
- Staggered in time and space; used with blackout, brownout, introduction.
- Moving by turning over and over on an axis.
- Extending in gentle undulations (of the landscape).
- Making a continuous sound.