Silly face (3)
I believe the answer is:
mug
I believe this clue is a double definition.
'silly' is the first definition.
(both can mean a foolish person)
'face' is the second definition.
(informal term for face)
(Other definitions for mug that I've seen before include "Cup; stupid person" , "Make a face" , "Beaker" , "simpleton" , "Large drinking vessel or slang victim" .)