One is apart, possibly result of marital trouble? (10)
I believe the answer is:
separation
'marital trouble?' is the definition.
The definition and answer can be both acts as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'one is apart possibly' is the wordplay.
'possibly' indicates an anagram.
'one'+'is'+'apart'='oneisapart'
'oneisapart' is an anagram of 'SEPARATION'.
'result of' is the link.
Can you help me to learn more?
(Other definitions for separation that I've seen before include "divorce" , "Break-up" , "One is apart (anag)" , "Disunion" , "Detachment" .)