The most common and most likely answer to this crossword clue is the 10 letter word SATISFYING
I've seen this crossword clue in The Times
S
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More clues leading to the result SATISFYING
- Pleasurable meeting?
- Enjoyable day is going well, draining lake
- Rewarding school test is quick
- Meeting starts to struggle and to signify trouble
- Fulfilling the conditions by paying in full
- Cool enough?
- Enjoyable meeting
- Say — isn’t fig revolting? On the contrary
- Productive meeting
- Pleasing adage about female model making a comeback
Buddy explains!

The straight part
We know that "Rewarding" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case rewarding = satisfying.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 SATISFYING mean?
SATISFYING verb- To do enough for; to meet the needs of; to fulfill the wishes or requirements of.
- To cause (a sentence) to be true when the sentence is interpreted in one's universe.
- To convince by ascertaining; to free from doubt.
- To pay to the extent of what is claimed or due.
- To answer or discharge (a claim, debt, legal demand, etc.); to give compensation for.
- That satisfies, gratifies or pleases; that removes any feeling of lack.