Speed runs up getting run over (5)
I believe the answer is:
recap
'run over' is the definition.
(I've seen this before)
'speed runs up' is the wordplay.
'speed' becomes 'pace' (pace is a kind of speed**).
'runs' becomes 'r' (cricket abbreviation).
'up' shows that the letters should be reversed in order (in down clue: letters go upwards).
'pace'+'r'='pacer'
'pacer' written backwards gives 'RECAP'.
'getting' acts as a link.
(Other definitions for recap that I've seen before include "Summarise at the end" , "Go over study material again" , "Go back over the main points" , "Provide summary" , "Run over the points again" .)