One instrumental in distributing loot? (4)

I believe the answer is:

tool

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'one instrumental' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.

'distributing loot?' is the wordplay.
'distributing' indicates an anagram.
'loot' anagrammed gives 'TOOL'.

'in' acts as a link.

Can you help me to learn more?

(Other definitions for tool that I've seen before include "Appliance" , "Pawn" , "Maybe saw" , "Implement - agency" , "Hand implement" .)

I've seen this clue in the Evening Standard.

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