Key worker or hairdresser? (9)
I believe the answer is:
locksmith
This clue is a double definition.
'key worker' is the first definition.
(someone who works with keys and locks)
'hairdresser?' is the second definition.
(I've seen this before)
'or' is the link.
(Other definitions for locksmith that I've seen before include "Security device maker" , "Maker of secure fasteners" , "Security expert" , "hairdresser?" , "opener" .)