Barrel officer commanding twice rolled over, fair target? (7)
I believe the answer is:
coconut
'fair target?' is the definition.
(I've seen this before)
'barrel officer commanding twice rolled over' is the wordplay.
'barrel' becomes 'tun' (tun is a kind of barrel).
'officer' becomes 'oc' (I've seen this in other clues).
'commanding twice' becomes 'oc' (I can't justify this - if you can you should give a lot more credence to this answer).
'rolled over' shows that the letters should be reversed in order.
'tun'+'oc'+'oc'='tunococ'
'tunococ' backwards is 'COCONUT'.
Can you help me to learn more?
(Other definitions for coconut that I've seen before include "Seed of a tropical palm" , "Large palm fruit" , "Large palm seed" , "Shy occupier" , "cut from the palm?" .)