Crossword Genius

Drain small jug (5)

Ross

I believe the answer is:

sewer

'drain' is the definition.
(I know that sewer is a type of drain)

'small jug' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'jug' becomes 'ewer' (type of vessel).
's'+'ewer'='SEWER'

(Other definitions for sewer that I've seen before include "It drains" , "One working with material?" , "Drainage conduit" , "Filthy channel" , "Underground drain" .)

I've seen this clue in The Independent, The Telegraph and The Times.
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