Duct conveying liquid tin and other metal (5)

I believe the answer is:

canal

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'duct conveying liquid' is the definition.

'tin and other metal' is the wordplay.
'tin' becomes 'can' (synonyms).
'and' is a charade indicator (letters next to each other).
'other metal' becomes 'al' (Al is an example. I am not sure about the 'other' bit.).
'can'+'al'='CANAL'

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(Other definitions for canal that I've seen before include "Grand Union perhaps" , "Passage" , "eg Grand Union" , "navigate this?" , "Manmade flower" .)

I've seen this clue in The Times.

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