Grill family vegetable (7)
I believe the answer is:
pumpkin
'vegetable' is the definition.
(I've seen this before)
'grill family' is the wordplay.
'grill' becomes 'pump' (I've seen this in other clues).
'family' becomes 'kin' ('kin' can be a synonym of 'family').
'pump'+'kin'='PUMPKIN'
(Other definitions for pumpkin that I've seen before include "coach would appear at midnight" , "Large orange fruit of the squash family" , "Orange-yellow fruit" , "Halloween vegetable" , "It's a Halloween tradition" .)