Right to affirm mad person (5)

I believe the answer is:

raver

'mad person' is the definition.

'right to affirm' is the wordplay.
'right' becomes 'r' (common abbreviation).
'to affirm' becomes 'aver' ('aver' can be a synonym of 'affirm').
'r'+'aver'='RAVER'

(Other definitions for raver that I've seen before include "Wild partygoer" , "Madman" , "attending acid-house party?" , "Dedicated partygoer" , "Party animal" .)

I've seen this clue in The Times.

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