Uncovered runner injured skater in front of queen (8)
I believe the answer is:
streaker
'uncovered runner' is the definition.
(a streaker runs around naked)
'injured skater in front of queen' is the wordplay.
'injured' is an anagram indicator.
'in front of' is a charade indicator (letters next to each other).
'queen' becomes 'ER' (abbreviation for Elizabeth Regina).
'skater' anagrammed gives 'streak'.
'streak'+'er'='STREAKER'
(Other definitions for streaker that I've seen before include "One barely running in public" , "A naughtily nude runner (8)." , "Person running without clothes" , "Someone running naked in a public place" , "One can run fast" .)