Crossword Genius

Backing spoils instrument (4)

Ross

I believe the answer is:

tool

'instrument' is the definition.
(I know that instrument can be written as tool)

'backing spoils' is the wordplay.
'backing' is a reversal indicator.
'spoils' becomes 'loot' (both can mean a reward or proceeds).
'loot' written backwards gives 'TOOL'.

(Other definitions for tool that I've seen before include "For example, saw" , "Drive motor skilfully" , "Gun" , "Utensil; implement" , "Working instrument" .)

I've seen this clue in The Guardian.
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