Light open-toed shoe (6)
I believe the answer is:
sandal
'light open-toed shoe' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for sandal that I've seen before include "Type of footwear" , "Item of footwear" , "Informal shoe" , "Light open shoe" , "Light open-toed shoe" .)