Crossword Genius

Per capita split that's unbalanced to be revised perhaps (4,10)

Ross

I believe the answer is:

past participle

'be revised perhaps' is the definition.
('revised' is a past participle)

'per capita split that's unbalanced' is the wordplay.
'that's unbalanced' indicates an anagram.
'per'+'capita'+'split'='percapitasplit'
'percapitasplit' is an anagram of 'PAST PARTICIPLE'.

'to' is the link.

(Another definition for past participle that I've seen is " had, say".)

I've seen this clue in The Times.
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