A 'Division 1' singer (4)

I believe the answer is:

diva

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'singer' is the definition.
(diva can mean a female opera singer)

'a division 1' is the wordplay.
'a division' becomes 'div' (I can't justify this - if you can you should give a lot more credence to this answer).
'd' becomes 'a' (both can mean one).
'div'+'a'='DIVA'

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(Other definitions for diva that I've seen before include "One who sings" , "Celebrated female operatic star" , "Successful lady" , "Great singer" , "Grand female singer" .)

I've seen this clue in the Evening Standard.

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