Back from Somerset, is now doing it where he works (2,4)
I believe the answer is:
on site
'doing it where he works' is the definition.
The definition suggests a singular noun but the answer is not.
'back from somerset is now' is the wordplay.
'back' is a reversal indicator.
'from' says the answer is hidden in the clue.
'etisno' can be found hidden inside 'somerset is now'.
'etisno' backwards is 'ON-SITE'.
Can you help me to learn more?
(Other definitions for on site that I've seen before include "Handy for location shooting" , "In the building" , "in the immediate area?" , "Conveniently located" , "at the scene" .)