Shift around excess garments (7)
I believe the answer is:
dresses
'garments' is the definition.
(dress is a kind of garment)
'shift around excess' is the wordplay.
'shift' becomes 'dress' (shift can mean a dress).
'around excess' becomes 'es' (I can't justify this - if you can you should believe this answer much more).
'dress'+'es'='DRESSES'
Can you help me to learn more?
(Other definitions for dresses that I've seen before include "sacks, possibly" , "Costumes" , "Gets tired" , "Frocks" , "falls into line" .)