Remarkable contents of ruin (3)

I believe the answer is:

mar

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

'remarkable contents of' is the wordplay.
'contents of' says the answer is hidden in the clue.
'MAR' is hidden within 'remarkable'.

(Other definitions for mar that I've seen before include "A windy month" , "Spoil stuff" , "Spoil or deface" , "Disfigure" , "Spoil something" .)

I've seen this clue in The Mirror.

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