A more suitable partner in crime (7)

I believe the answer is:

abetter

'partner in crime' is the definition.
(I've seen this before)

'a more suitable' is the wordplay.
'more suitable' becomes 'better'.
'a'+'better'='ABETTER'

(Other definitions for abetter that I've seen before include "who gives encouragement?" , "accessory" , "Criminal's assistant" , "Partner in crime; tree bat (anag.)" , "An accomplice" .)

I've seen this clue in The Times.

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