Clown rolling barrel is fair target (7)
I believe the answer is:
coconut
'fair target' is the definition.
(I've seen this before)
'clown rolling barrel' is the wordplay.
'clown' becomes 'coco' (Nicolai Poliakoff aka Coco the Clown).
'rolling' says the letters should be written in reverse.
'barrel' becomes 'tun' (tun is a kind of barrel).
'tun' in reverse letter order is 'nut'.
'coco'+'nut'='COCONUT'
'is' acts as a link.
(Other definitions for coconut that I've seen before include "Seed of a tropical palm" , "Large palm fruit" , "Shy occupier" , "Fruit at which to shy" , "cut from the palm?" .)