Lancastrian misses train going around Rialto (6)

I believe the answer is:

canals

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'lancastrian misses train going around rialto' is the definition.
I can't judge whether this definition defines the answer.

'lancastrian misses train going around' is the wordplay.
'misses' is a deletion indicator.
'going around' is an anagram indicator.
'lancastrian' with 'train' taken away is 'lcasan'.
'lcasan' is an anagram of 'CANALS'.

Can you help me to learn more?

(Other definitions for canals that I've seen before include "Man-made waterways" , "Artificial waterways" , "Artificial water channels" .)

I've seen this clue in the Irish Times.

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