Hinged cover (3)
I believe the answer is:
lid
'hinged cover' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for lid that I've seen before include "Cover as for jar" , "Bottle or jar top" , "Top for pot or jar" , "Hinged or removable cover as for bottle" , "Receptacle cover" .)