Grass shoot (4)
I believe the answer is:
rush
I believe this is a double definition.
'grass' is the first definition.
(thesaurus)
'shoot' is the second definition.
(thesaurus)
(Other definitions for rush that I've seen before include "Move with haste" , "Liverpool footballer once" , "Hurry to the grassy plant" , "Burn rubber" , "Water plant; hurry" .)