Crossword Genius

At which sprinters run, holding as much as possible, and hide (4,4)

Ross

I believe the answer is:

full pelt

'at which sprinters run' is the definition.
(to run at full pelt is to run very fast)

'holding as much as possible and hide' is the wordplay.
'holding as much as possible' becomes 'full'.
'and' is a charade indicator (letters next to each other).
'hide' becomes 'pelt' (synonyms).
'full'+'pelt'='FULL-PELT'

(Another definition for full pelt that I've seen is " As fast as possible".)

I've seen this clue in The Guardian.
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