Give away most of red meat (6)
I believe the answer is:
reveal
'give away' is the definition.
(I know that reveal is a kind of give away)
'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 removed is 're'.
're'+'veal'='REVEAL'
(Other definitions for reveal that I've seen before include "Tell the truth" , "Make disclosure" , "let out" , "Open up" , "Disclose or uncover" .)