River of outer Torquay (3)

I believe the answer is:

tay

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'river' is the definition.
(Scottish river)

I can't explain the rest of the clue.

(Other definitions for tay that I've seen before include "Wicklow lake" , "Scotland's longest river" , "Scottish loch" , "The - Bridge Disaster (McGonagall)" , "Longest river of Scotland" .)

I've seen this clue in the Evening Standard.

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