No-one stressed is returning for work (9)
I believe the answer is:
situation
'for work' is the definition.
(situation is a kind of work)
'no-one stressed is returning' is the wordplay.
'one' becomes 'i' (Roman numeral).
'stressed' becomes 'taut' (I've seen this in other clues).
'returning' shows that the letters should be reversed in order.
'no'+'i'+'taut'+'is'='noitautis'
'noitautis' back-to-front is 'SITUATION'.
(Other definitions for situation that I've seen before include "Job; set of circumstances" , "Place" , "Post" , "The general state of things" , "State, condition" .)