Creditable help for the scorer (6)

I believe the answer is:

assist

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'creditable help' is the definition.
'assist' can be an answer for 'help' (to assist someone is to help them). I'm not certain of the 'creditable' bit.

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for assist that I've seen before include "Pass to scorer" , "Work as a subordinate" , "Give help" , "Expedite" , "Pitch in" .)

I've seen this clue in the Evening Standard.

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