Long skirt worn in southeast Asia (6)
I believe the answer is:
sarong
(Other definitions for sarong that I've seen before include "Asian skirt-like garment" , "Malay cloth" , "Unisex Malayan garment of cloth wrapped around body" , "Groans about Malayan skirt-like garment" , "Brightly-coloured skirt in the South Pacific" .)