Environment in which one's working as a hairdresser (7)
I believe the answer is:
setting
'environment' is the definition.
(setting is a kind of environment)
'one's working as a hairdresser' is the wordplay.
I cannot quite understand how this works, but
'as' could be 'in' (I've seen this in other clues) and 'in' is present in the answer.
This explanation may well be incorrect...
'in which' acts as a link.
Can you help me to learn more?
(Other definitions for setting that I've seen before include "making up a crossword puzzle" , "Mount for gem" , "Metal holding a gem" , "Surroundings; hardening" , "Environment" .)