Revealing about meat (4)
I believe the answer is:
veal
'meat' is the definition.
(veal is a kind of meat)
'revealing about' is the wordplay.
'about' indicates the answer is hidden within the clue (the clue goes around or about the answer).
'VEAL' can be found hidden inside 'revealing'.
(Other definitions for veal that I've seen before include "cuisine" , "Type of meat" , "Calves' flesh as food" , "what the meat course may be" , "meat, R [ROSE] maybe" .)