Way past locks that POW got around? (7)

I believe the answer is:

towpath

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'way' is the definition.
(towpath is a kind of way)

'past locks that pow got around?' is the wordplay.
'that pow' can be anagrammed to 'TOWPATH'.
But, I am not clear how the anagram is indicated.

Can you help me to learn more?

(Other definitions for towpath that I've seen before include "canal feature" , "Canalside way" , "Canal-side walkway" , "Canal walk" , "Riverside walk" .)

I've seen this clue in The Times.

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