Worth coming back from retirement? (5)
I believe the answer is:
merit
'worth' is the definition.
(I know that merit is a type of worth)
'back from retirement?' is the wordplay.
'back' is a reversal indicator.
'from' indicates a hidden word.
'tirem' is hidden within 'retirement'.
'tirem' backwards is 'MERIT'.
'coming' is the link.
(Other definitions for merit that I've seen before include "Advantage" , "credit" , "Excellence, worth" , "Goodness" , "Deserve; excellence" .)