Bin disguised as a sink (5)
I believe the answer is:
basin
'sink' is the definition.
(I know that sink can be written as basin)
'bin disguised as a' is the wordplay.
I cannot quite see how this works, but
'as' could be 'in' (I've seen this in other clues) and 'in' is found within the answer.
'a' is within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for basin that I've seen before include "Washbowl" , "dock, maybe" , "Round open dish for washing" , "requirement for cleansing" , "Region drained by a river" .)