Girl getting employment in musical (8)
I believe the answer is:
carousel
'musical' is the definition.
(I've seen this before)
'girl getting employment' is the wordplay.
'girl' becomes 'carol' (woman's name).
'getting' means one lot of letters goes inside another.
'employment' becomes 'use' (how something is used).
'carol' going around 'use' is 'CAROUSEL'.
'in' acts as a link.
(Other definitions for carousel that I've seen before include "Luggage conveyor belt and fairground ride" , "Musical - merry-go-round" , "Conveyer belt for arriving air travellers' luggage" , "fair entertainment?" , "it's located in 'Arrivals'" .)