Hector on tower guarding city (7)

I believe the answer is:

toronto

'city' is the definition.
(Toronto is an example)

'hector on tower guarding' is the wordplay.
'guarding' indicates the answer is hidden within the clue.
'TORONTO' is hidden in the letters of 'hector on tower'.

(Other definitions for toronto that I've seen before include "North American city" , "place on Lake Ontario" , "major city" , "Transatlantic city" , "Largest city in Canada" .)

I've seen this clue in The Sun.

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