Crossword Genius

Complain about bum rap (4)

Ross

I believe the answer is:

carp

'complain' is the definition.
(thesaurus)

'about bum rap' is the wordplay.
'about' becomes 'c' (abbreviation for 'circa'**).
'bum' is an anagram indicator (bum can mean faulty or wrong).
'rap' is an anagram of 'arp'.
'c'+'arp'='CARP'

(Other definitions for carp that I've seen before include "Fish - complain" , "Go on at" , "Raise petty objections about goldfish" , "Complain continually" , "praise? The opposite" .)

I've seen this clue in The Telegraph.
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