Crossword Genius

A lake to rant about? (4)

Ross

I believe the answer is:

tarn

'a lake' is the definition.
(I know that tarn is a type of lake)

'rant about?' is the wordplay.
'about?' is an anagram indicator (I've seen 'about' mean this).
'rant' anagrammed gives 'TARN'.

'to' acts as a link.

(Other definitions for tarn that I've seen before include "Scottish mountain lake" , "Small mountain lake" , "High water" , "Mountain pool: French department" .)

I've seen this clue in the Evening Standard.
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