Restrict credit to a politician (5)

I believe the answer is:

cramp

'restrict' is the definition.
(I know that cramp is a more specific form of the action restrict)

'credit to a politician' is the wordplay.
'credit' becomes 'cr' (abbreviation).
'politician' becomes 'MP' (Member of Parliament).
'cr'+'a'+'mp'='CRAMP'

(Other definitions for cramp that I've seen before include "Sudden painful tightening of a muscle" , "Severe muscular pain" , "writers may be familiar with" , "restraint" , "Contract" .)

I've seen this clue in The Globe and Mail.

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