Bachelor, thorough, gets trophy for plant (9)
I believe the answer is:
buttercup
'plant' is the definition.
(buttercup is a kind of plant)
'bachelor thorough gets trophy' is the wordplay.
'bachelor' becomes 'b' (abbreviation e.g. BA=Bachelor of Arts).
'thorough' becomes 'utter'.
'gets' is a charade indicator (letters next to each other).
'trophy' becomes 'cup' (cup is a kind of trophy).
'b'+'utter'+'cup'='BUTTERCUP'
'for' acts as a link.
(Other definitions for buttercup that I've seen before include "Common yellow flower" , "Meadow flower poisonous to cattle" , "Yellow-flowered grassland plant" , "Common meadow flower" , "Rich yellow wild flower" .)