Crossword Genius

Opposition recruit Napoli’s centre back (4)

Ross

I believe the answer is:

anti

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'opposition' is the definition.
(I've seen this before)

'recruit napoli's centre back' is the wordplay.
'recruit napoli' becomes 'ant' (I can't justify this - if you can you should give a lot more credence to this answer).
'centre' says to take the centre.
'back' becomes 'spine' (synonyms).
The middle of 'spine' is 'i'.
'ant'+'i'='ANTI'

Can you help me to learn more?

(Other definitions for anti that I've seen before include "'No' voter" , "[NO MAN]" , "Opposition member" , "Policy's opponent" , "(Person who is) not in favour" .)

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