Backward-looking philosophy to suit minister being nasty (14)

I believe the answer is:

restitutionism

'backward-looking philosophy' is the definition.
(belief in the restoration an earlier age)

'to suit minister being nasty' is the wordplay.
'being nasty' indicates anagramming the letters.
'to'+'suit'+'minister'='tosuitminister'
'tosuitminister' anagrammed gives 'RESTITUTIONISM'.

I've seen this clue in The Guardian.

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