Boar's head brought up to be cooked (7)
I believe the answer is:
braised
'be cooked' is the definition.
(similar in meaning)
'boar's head brought up' is the wordplay.
'head' indicates taking the first letters.
'brought up' becomes 'raised' (raising is a kind of bringing up).
The initial letter of 'boars' is 'b'.
'b'+'raised'='BRAISED'
'to' is the link.
(Other definitions for braised that I've seen before include "Stewed in closed pot" , "Fried then slowly stewed" .)