Twigs of willow (6)
I believe the answer is:
osiers
'twigs of willow' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for osiers that I've seen before include "Flexible twigs used in basketwork" , "Small willows" , "Roses I find with flexible willow twigs" , "Willow twigs used in basket-making" , "Willow twigs used in basket-work" .)