Casts off (5)
I believe the answer is:
sheds
'casts off' is the definition.
('shed' can be a synonym of 'cast off')
This is the entire clue.
(Other definitions for sheds that I've seen before include "Single-storey outbuildings" , "Small huts as used in gardens" , "stores" , "Discards" , "Casts off the outbuildings" .)