Grass; boy's name (7)
I believe the answer is:
timothy
I believe this clue is a double definition.
'grass' is the first definition.
(I know that timothy is a type of grass)
'boy's name' is the second definition.
(Other definitions for timothy that I've seen before include "A grass; two NT books" , "Man's name" , "Letter recipient" , "Bible book" , "New Testament book" .)