Even an empty one has its occupied part (3)
I believe the answer is:
cup
'even an empty one' is the definition.
I can't judge whether this defines the answer.
'its occupied part' is the wordplay.
'part' indicates a hidden word.
'CUP' is hidden in the letters of 'its occupied'.
'has' is the link.
Can you help me to learn more?
(Other definitions for cup that I've seen before include "competition" , "Beaker" , "Trophy, drink" , "Container to drink from - prize" , "Trophy; drinking vessel" .)