Crossword Genius

Fine tune objective (4)

Ross

I believe the answer is:

fair

'objective' is the definition.
(thesaurus)

'fine tune' is the wordplay.
'fine' becomes 'f' (abbreviation).
'tune' becomes 'air' (I've seen this before).
'f'+'air'='FAIR'

(Other definitions for fair that I've seen before include "Average" , "Trade exhibition, (of weather) fine" , "Blonde; impartial" , "Satisfactory" , "The mart is blond" .)

I've seen this clue in The Independent.
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