Back from "The Green Man" (4)
I believe the answer is:
emil
'man' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.
'back from the green' is the wordplay.
'back from' indicates one should take the final letters (the letter at the back of the word).
'green' becomes 'mil' (I can't explain this - if you can you should give a lot more credence to this answer).
The last letter of 'the' is 'e'.
'e'+'mil'='EMIL'
Can you help me to learn more?
(Other definitions for emil that I've seen before include "German boy" , "- - Zatopek, Olympic runner" , "French boy's name" .)