Damaged red hair is more resilient (7)

I believe the answer is:

hardier

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

'damaged red hair' is the wordplay.
'damaged' indicates anagramming the letters.
'red'+'hair'='redhair'
'redhair' is an anagram of 'HARDIER'.

'is' acts as a link.

I've seen this clue in The Irish Times.

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