Change of clothing (5)
I believe the answer is:
shift
I believe this clue is a double definition.
'change' is the first definition.
(I know that change can be written as shift)
'clothing' is the second definition.
(I know that shift is a type of undergarment)
'of' is the link.
(Other definitions for shift that I've seen before include "Move - working period" , "Move quickly; dress" , "Move; loose dress" , "Move; garment" , "Key to move between lower- and upper-case" .)