A profit once more (5)

I believe the answer is:

again

'once more' is the definition.
(synonyms)

'a profit' is the wordplay.
'profit' becomes 'gain' (synonyms).
'a'+'gain'='AGAIN'

(Other definitions for again that I've seen before include "return" , "Next time" , "'Another time, once more (5)'" , "Anew" , "On the other hand" .)

I've seen this clue in The Times, The Telegraph, The Irish Independent, The Daily Express and The Mirror.

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