AHA rip off one of The Outcasts (6)

I believe the answer is:

pariah

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'one of the outcasts' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.

'aha rip off' is the wordplay.
'off' indicates an anagram.
'aha'+'rip'='aharip'
'aharip' anagrammed gives 'PARIAH'.

Can you help me to learn more?

(Other definitions for pariah that I've seen before include "Outcast (state)" , "Person despised and rejected by society" , "Person ostracised by society" , "person shunned" , "Person rejected by society, outcast" .)

I've seen this clue in the Irish Times (Crosaire) and the Irish Times.

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