Triangular cape or shawl (5)
I believe the answer is:
fichu
I believe this clue is a double definition.
'triangular cape' is the first definition.
(I've seen this in another clue)
'shawl' is the second definition.
(I've seen this before)
(Other definitions for fichu that I've seen before include "Triangular shawl round shoulders and neck" , "Lace shawl" , "old-fashioned cape" , "Cloth triangle" , "Woman's small shawl or scarf" .)