Canal's entrance in eastern Lahore collapsed

I believe the answer is:

ear hole

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'canal's' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps there's an association between them I don't understand?

'entrance in eastern lahore collapsed' is the wordplay.
'entrance in' suggests taking the first letters.
'collapsed' indicates anagramming the letters.
The initial letter of 'eastern' is 'e'.
'lahore' is an anagram of 'arhole'.
'e'+'arhole'='EAR-HOLE'

Can you help me to learn more?

(Other definitions for ear hole that I've seen before include "Sound receiver" , "Aural opening" .)

I've seen this clue in The Telegraph.

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