The most common and most likely answer to this crossword clue is the 6 letter word RUMBLE
I've seen this crossword clue in Independent
R
U
M
B
L
E
More clues leading to the result RUMBLE
- Discover truth about complaint – not good
- Discover heartless mob in command
- Discover the truth about low noise
- Moan when missing opening fight in Vegas
- Fight for control over central Zambia
- Grass on twig?
- Find out about regulation doctor introduced
- Discover the truth about doctor breaking law
- Discover the truth about gang fight in New York City?
- Discover the truth about collapse? Not initially
Buddy explains!

The straight part
We know that "Find out about" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case find out about = rumble.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 RUMBLE mean?
RUMBLE noun- A low, heavy, continuous sound, such as that of thunder or a hungry stomach.
- A street fight or brawl.
- A rotating cask or box in which small articles are smoothed or polished by friction against each other.
- A seat for servants, behind the body of a carriage.
- To make a low, heavy, continuous sound.
- To discover deceitful or underhanded behaviour.
- To move while making a rumbling noise.
- To fight; to brawl.
- (of a game controller) to provide haptic feedback by vibrating.
- To cause to pass through a rumble, or polishing machine.
- To murmur; to ripple.
- An onomatopoeia describing a rumbling noise