Crossword Genius

Get fitter calves, once exercised (10)

Ross

I believe the answer is:

convalesce

'get fitter' is the definition.
(to convalesce is to get better after illness)

'calves once exercised' is the wordplay.
'exercised' is an anagram indicator.
'calves'+'once'='calvesonce'
'calvesonce' is an anagram of 'CONVALESCE'.

(Other definitions for convalesce that I've seen before include "Improve" , "Recover after an illness" .)

I've seen this clue in The Telegraph.
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