Something from the sewer to throw across street (9)

I believe the answer is:

topstitch

'something from the sewer' is the definition.
(something somebody might sew)

'to throw across street' is the wordplay.
'throw' becomes 'pitch' (pitch is a kind of throw).
'across' indicates putting letters inside.
'street' becomes 'st' (abbreviation).
'pitch' going around 'st' is 'pstitch'.
'to'+'pstitch'='TOPSTITCH'

I've seen this clue in The Times.

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