Produces green ends somehow (9)
I believe the answer is:
engenders
'produces' is the definition.
The definition and answer can be both related to bodily activities as well as being verbs in their -s form.
Perhaps you can see an association between them that I don't see?
'green ends somehow' is the wordplay.
'somehow' is an anagram indicator.
'green'+'ends'='greenends'
'greenends' is an anagram of 'ENGENDERS'.
Can you help me to learn more?
(Other definitions for engenders that I've seen before include "Brings forth, generates" , "Gives rise to, causes" , "Leads to" , "Produces, causes" .)