The most common and most likely answer to this crossword clue is the 6 letter word REVEAL
I've seen this crossword clue in The Times
R
E
V
E
A
L
More clues leading to the result REVEAL
- Have great delight taking in a show
- Show about flesh of calves
- Unlimited free produce from cattle show
- Final disclosure about farmed meat
- Paint the town red, taking in a show
- Celebrate screening a show
- Have fun hosting a show
- Show soldiers meat from farm animal
- Wingers of value in one Madrid team for show
- Let slip clergyman brewed ale
Buddy explains!

The straight part
We know that "Final disclosure" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case final disclosure = reveal.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 REVEAL mean?
REVEAL noun- The outer side of a window or door frame; the jamb.
- A revelation; an uncovering of what was hidden.
- (obsolete in the US) The side of an opening for a window, doorway, or the like, between the door frame or window frame and the outer surface of the wall; or, where the opening is not filled with a door, etc., the whole thickness of the wall; the jamb.
- To uncover; to show and display that which was hidden.
- To communicate that which could not be known or discovered without divine or supernatural instruction.