Rants wildly about mountain lakes (5)

I believe the answer is:

tarns

'mountain lakes' is the definition.
(I've seen this before)

'rants wildly' is the wordplay.
'wildly' indicates an anagram.
'rants' anagrammed gives 'TARNS'.

'about' is the link.

(Another definition for tarns that I've seen is " Mountain lakes".)

I've seen this clue in the Evening Standard.

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