Restaurant worker wears it for a change before start of shift (8)
I believe the answer is:
waitress
'restaurant worker' is the definition.
(I've seen this before)
'wears it for a change before start of shift' is the wordplay.
'for a change' indicates anagramming the letters.
'before' says to put letters next to each other.
'start of' says to take the initial letters.
The initial letter of 'shift' is 's'.
'wears'+'it'='wearsit'
'wearsit' anagrammed gives 'waitres'.
'waitres'+'s'='WAITRESS'
(Other definitions for waitress that I've seen before include "Restaurant employee" , "Restaurant worker" , "Woman serving meal" , "Server at table" , "One serving at table" .)