More imposing old lady turned red (7)

I believe the answer is:

grander

'more imposing' is the definition.
(I've seen this in another clue)

'old lady turned red' is the wordplay.
'old lady' becomes 'gran' (I've seen this before).
'turned' shows that the letters should be reversed in order.
'red' written backwards gives 'der'.
'gran'+'der'='GRANDER'

(Another definition for grander that I've seen is " more impressive".)

I've seen this clue in The Times.

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