In remunerative work, he'd got round the Inland Revenue! (5)
I believe the answer is:
hired
'in remunerative work' is the definition.
Although both the answer and 'work' are verbs, they are not in the same form of the verb.
'he'd got round the inland revenue' is the wordplay.
'got round' is an insertion indicator (some letters go round others).
'the inland revenue' becomes 'ir' (abbreviation for Inland Revenue).
'hed' going around 'ir' is 'HIRED'.
Can you help me to learn more?
(Other definitions for hired that I've seen before include "Employed for wages" , "Employed or engaged" , "Taken into service" , "Chartered" , "Taken on to staff" .)