Basket fiber (5)
I believe the answer is:
straw
'basket fiber' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for straw that I've seen before include "Residue of cereal crop" , "Pale-yellow - through which one can drink" , "politician" , "Stalk of dry grass" , "Dried stalks; yellow" .)