Grass clumps (5)
I believe the answer is:
tufts
'grass clumps' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for tufts that I've seen before include "Bunches of hair or grass" , "Bunches of hairs" , "Clumps" , "Bunches of threads or feathers" .)