Crossword Genius

An improved partner in crime? (7)

Ross

I believe the answer is:

abetter

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

'an improved' is the wordplay.
'an' becomes 'a'.
'improved' becomes 'better' (similar in meaning).
'a'+'better'='ABETTER'

(Other definitions for abetter that I've seen before include "associate" , "one who helps in a crime" , "He criminally assists" , "I'll help!" , "He helps criminal" .)

I've seen this clue in The Guardian.
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