Bog plant Rod tore in a frenzy (7)

I believe the answer is:

redroot

'bog plant' is the definition.
(plant found in boggy areas)

'rod tore in a frenzy' is the wordplay.
'in a frenzy' indicates an anagram.
'rod'+'tore'='rodtore'
'rodtore' with letters rearranged gives 'REDROOT'.

I've seen this clue in The Times.

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