Crossword Genius

Pretty loud song (4)

Ross

I believe the answer is:

fair

'pretty' is the definition.
(thesaurus)

'loud song' is the wordplay.
'loud' becomes 'f' (A musical term).
'song' becomes 'air' (I've seen this before**).
'f'+'air'='FAIR'

(Other definitions for fair that I've seen before include "Just treatment of others" , "honest" , "Blonde; impartial" , "light headed" , "Even-handed travelling show?" .)

I've seen this clue in The Telegraph.
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