Crossword Genius

Fine-tune commercial exactly (6)

Ross

I believe the answer is:

adjust

'fine-tune' is the definition.
(I've seen this before)

'commercial exactly' is the wordplay.
'commercial' becomes 'ad' (abbreviation for advertisement).
'exactly' becomes 'just' (synonyms).
'ad'+'just'='ADJUST'

(Other definitions for adjust that I've seen before include "Alter by small amount to make right for use" , "carry out minor alterations" , "Adapt to new conditions" , "Adapt (oneself)" , "Regulate, alter by small amount" .)

I've seen this clue in The Telegraph.
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