It’s green with a red tip, boy (6)
I believe the answer is:
oliver
'boy' is the definition.
'it's green with a red tip' is the wordplay.
I cannot quite understand how this works, but
'green' could be 'olive' (olive green is a kind of green) and 'olive' is present in the answer.
'red' could be 'r' (I've seen this in other clues) and 'r' is located in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for oliver that I've seen before include "Fictional boy who famously asked for more" , "stage show" , "Orphan recruited by criminal gang" , "Dickens boy named Twist" , "Dickens boys who asked for more" .)