Denied working aged ten (7)
I believe the answer is:
negated
'denied' is the definition.
(I've seen this before)
'working aged ten' is the wordplay.
'working' indicates anagramming the letters.
'aged'+'ten'='agedten'
'agedten' anagrammed gives 'NEGATED'.
(Other definitions for negated that I've seen before include "Made ineffective" , "Cancelled or destroyed the effect of something" , "Discredited" , "Contradicted" , "Denied" .)