Mostly torn bananas back in dish (7)
I believe the answer is:
stunner
'dish' is the definition.
(both can mean a very attractive person)
'mostly torn bananas back' is the wordplay.
'mostly' means to remove the last letter.
'torn' becomes 'rent' (rending is a kind of tearing).
'bananas' becomes 'nuts' (as in crazy**).
'back' says the letters should be written in reverse.
'rent' with its final letter taken away is 'ren'.
'ren'+'nuts'='rennuts'
'rennuts' reversed gives 'STUNNER'.
'in' is the link.
(Other definitions for stunner that I've seen before include "Good-looker (informal)" , "Peach" , "Beauty (informal)" , "Attractive person" , "Very attractive girl" .)