Crossword Genius

Respond concerning performance (5)

Ross

I believe the answer is:

react

'respond' is the definition.
(to react to something is to respond to it)

'concerning performance' is the wordplay.
'concerning' becomes 're' (both can mean on a particular topic).
'performance' becomes 'act' (act is a kind of performance).
're'+'act'='REACT'

(Other definitions for react that I've seen before include "Hit back" , "Take" , "Trace (anag)" , "Retaliate" , "Change chemically" .)

I've seen this clue in The Daily Express and The Mirror.
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