Garment left by dramatist (5)
I believe the answer is:
shawl
'garment' is the definition.
(shawl is a kind of garment)
'left by dramatist' is the wordplay.
'left' becomes 'l' (common abbreviation).
'by' means one lot of letters go next to another.
'dramatist' becomes 'shaw' (playwright George Bernard Shaw).
'l' after 'shaw' is 'SHAWL'.
(Other definitions for shawl that I've seen before include "Covering for head and shoulders" , "Cover for head and shoulders" , "Baby's wrap" , "Afghan" , "Woman's wrap" .)