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' says to put letters next to each other.
'dramatist' becomes 'shaw' (playwright George Bernard Shaw).
'l' put 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" .)