Old-fashioned feature of compasses (5)
I believe the answer is:
passe
'old-fashioned' is the definition.
(synonyms)
'feature of compasses' is the wordplay.
'feature of' indicates a hidden word.
'PASSE' is hidden within 'compasses'.
(Other definitions for passe that I've seen before include "Old fashioned - in France" , "Wrapped object" , "No longer fashionable" , "Outdated" , "Jaded" .)