Showing intense passion, run in race - perhaps as sprint's over (9)

'over' is the definition.
Both the answer and definition are adverbs. Maybe they are linked in a way I don't understand?

'showing intense passion run in race perhaps as sprint's' is the wordplay.
I cannot really understand how this works, but
'run' could be 'r' (cricket abbreviation) and 'r' is found within the answer.
'race' could be 'event' (I've seen this before) and 'event' is found within the leftover letters.
'sprint' could be 'fly' (I've seen this in another clue) and 'fly' is present in the remaining letters.
No letters remain.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?