Doctored integer to share in restoration (13)

I believe the answer is:

reintegration

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'restoration' is the definition.
Both the answer and definition are singular nouns.
Perhaps they are linked in a way I don't understand?

'doctored integer to share in' is the wordplay.
'doctored' is an anagram indicator.
'to share' becomes 'ration' (a ration is a share of a limited resource).
'in' means one lot of letters goes inside another.
'integer' anagrammed gives 'eintegr'.
'eintegr' going into 'ration' is 'REINTEGRATION'.

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I've seen this clue in The Daily Express.

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