Skater prepared to move very fast (6)
I believe the answer is:
streak
'move very fast' is the definition.
(I've seen this before)
'skater prepared' is the wordplay.
'prepared' indicates an anagram.
'skater' anagrammed gives 'STREAK'.
'to' is the link.
(Other definitions for streak that I've seen before include "Part of Ukraine" , "Move very fast; thin strip" , "run out of gear" , "feature of bacon" , "Appear in the nude" .)