Crossword Genius

A fight is concerning (5)

Ross

I believe the answer is:

about

'is concerning' is the definition.
(about can mean concerning or relating to)

'a fight' is the wordplay.
'fight' becomes 'bout' (as in a bout in boxing).
'a'+'bout'='ABOUT'

(Other definitions for about that I've seen before include "in action" , "Concerning; approximately" , "Approximately, or in vicinity" , "In the area of or in relation to" , "Regarding" .)

I've seen this clue in The Independent and The Telegraph.
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