Mistake in party politics (4)

I believe the answer is:

typo

'mistake' is the definition.
(typo is a kind of mistake)

'in party politics' is the wordplay.
'in' indicates a hidden word.
'TYPO' is hidden within 'party politics'.

(Other definitions for typo that I've seen before include "Finger problem" , "literal, perhaps" , "Printer's error" , "Small printing error" , "Printing error (colloq.)" .)

I've seen this clue in The Telegraph and The Guardian.

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