A leg of lamb or mutton (5)
I believe the answer is:
gigot
I believe this is a double definition.
'a leg of lamb' is the first definition.
(synonyms)
'mutton' is the second definition.
(I've seen this before)
(Other definitions for gigot that I've seen before include "A bit of mutton" , "Mutton or lamb leg" , "Perceive by touch" , "joint of meat" .)