Credit more staggering sporting achievement (6,4)

I believe the answer is:

record time

'sporting achievement' is the definition.
(eg a new world record)

'credit more staggering' is the wordplay.
'staggering' is an anagram indicator (letters stagger around).
'credit'+'more'='creditmore'
'creditmore' anagrammed gives 'RECORD TIME'.

I've seen this clue in The Guardian.

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