Scarecrow filler (5)
I believe the answer is:
straw
'scarecrow filler' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for straw that I've seen before include "Plant fibre used as fodder" , "Dried corn stalks" , "remnant of harvest" , "Stalk - tube for drinking" , "Dried stalks for fodder" .)