Bowl as seen in rubbish container (5)
I believe the answer is:
basin
'bowl' is the definition.
(synonyms)
'as seen in rubbish container' is the wordplay.
'seen in' means one lot of letters goes inside another.
'rubbish container' becomes 'bin' (rubbish bin).
'as' put into 'bin' is 'BASIN'.
(Other definitions for basin that I've seen before include "container" , "Sink for washing" , "Land drained by a river" , "Area drained by a river" , "Water receptacle" .)