Uncover most of red meat (6)
I believe the answer is:
reveal
'uncover' is the definition.
(I know that uncover can be written as reveal)
'most of red meat' is the wordplay.
'most of' means to remove the last letter.
'meat' becomes 'veal' (veal is a kind of meat).
'red' with its final letter taken off is 're'.
're'+'veal'='REVEAL'
(Other definitions for reveal that I've seen before include "Spill beans" , "Divulge; make visible" , "'Disclose, divulge (6)'" , "Remove cover to display" , "Open up" .)