Good at gardening (5-8)
I believe the answer is:
green-fingered
'good at gardening' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for green-fingered that I've seen before include "Good at gardening" , "Having aptitude at growing plants" , "Horticulturally talented!" , "With a talent for growing things" , "Possessing natural gardening skills?" .)