Kind of yellow grass (6)
I believe the answer is:
canary
I believe this is a double definition.
'kind of yellow' is the first definition.
(I've seen this before)
'grass' is the second definition.
(thesaurus)
(Other definitions for canary that I've seen before include "Bright yellow songbird" , "Pet bird" , "a sort of finch" , "- Wharf, - yellow" , "Caged song bird" .)