Cover with cloth (4)
'cover with cloth' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for drape that I've seen before include "Spread (cloth over)" , "Pared (anag.)" , "Cover loosely for padre" , "Screen" , "Adorn loosely (with cloth)" .)
(Other definitions for veil that I've seen before include "Hide; yashmak" , "coverage" , "Covering for head and face" , "To obscure" , "Transparent face cover" .)