Change dress (5)
I believe the answer is:
shift
This clue is a double definition.
'change' is the first definition.
(I know that shift is a type of change)
'dress' is the second definition.
(I know that shift is a type of dress)
(Other definitions for shift that I've seen before include "Switch" , "Move - working period" , "Time when group of people are working" , "Change (gear); dress" , "Key to move between lower- and upper-case" .)