Deer meat mentioned (4)
I believe the answer is:
hart
'deer' is the definition.
(hart is a kind of deer)
'meat mentioned' is the wordplay.
'meat' becomes 'heart' (heart is a kind of meat).
'mentioned' indicates a 'sounds like' (homophone) clue.
'heart' is a homophone of 'HART'.
(Other definitions for hart that I've seen before include "Stag" , "Animal" , "Male red-deer" , "Adult male red deer" , "Songwriting partnership, Rodgers and --" .)