Show's furniture item about to be disposed of (4)
I believe the answer is:
hair
'show's' is the definition.
(I've seen this before)
'furniture item about to be disposed of' is the wordplay.
'furniture item' becomes 'chair'.
'about to be' becomes 'c' (I've seen this in other clues).
'disposed of' is a deletion indicator.
'chair' with 'c' taken away is 'HAIR'.
(Other definitions for hair that I've seen before include "It grows from the skin" , "Growth from skin" , "It grows from a follicle" , "Showy garden flower" , "Nineteen sixties musical; filament" .)