Tuna-mad relative (4)

I believe the answer is:

aunt

'relative' is the definition.
(aunt is a type of relative)

'tuna-mad' is the wordplay.
'mad' indicates an anagram.
'tuna' is an anagram of 'AUNT'.

(Other definitions for aunt that I've seen before include "Parent's female sibling" , "Female relative" , "Sister of father/mother" , "Parent's sister" , "Tuna (anag.)" .)

I've seen this clue in The Mirror.

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