Hang loose (6)
'hang loose?' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for drape that I've seen before include "Wrap loosely (with cloth)" , "Loose fabric cover" , "Arrange (cloth) loosely round something" , "Cover with a loose cloth" , "Cover loosely with cloth" .)
(Other definitions for dangle that I've seen before include "wave" , "Temptingly offer" , "Hang -- Glenda (anag)" , "Hang provocatively" , "Hang loosely or swing" .)