Finished job with editor who's worn out (10)
I believe the answer is:
overworked
'worn out' is the definition.
Although both the answer and definition are past participle verbs, I can't see how they can define each other.
'finished job with editor' is the wordplay.
'finished' becomes 'over' (over can mean finished or ended).
'job' becomes 'work' (synonyms).
'with' says to put letters next to each other.
'editor' becomes 'ed' (abbreviation).
'over'+'work'+'ed'='OVERWORKED'
'who's' acts as a link.
Can you help me to learn more?
(Another definition for overworked that I've seen is " exhausted".)