Grassy plot handled by one with a natural ability for growing plants (5-8)
I believe the answer is:
green-fingered
'handled by one with a natural ability for growing plants' is the definition.
I can't tell whether this defines the answer.
'grassy plot' is the wordplay.
'grassy' becomes 'green' (I've seen this before).
'plot' becomes 'fingered' (I am not sure about this - if you are sure you should believe this answer much more).
'green'+'fingered'='GREEN-FINGERED'
Can you help me to learn more?
(Other definitions for green-fingered that I've seen before include "Possessing natural gardening skills?" , "Able to make plants grow well" , "With a talent for growing things" , "Adept at gardening" , "Good at gardening" .)