Race around the final hurdle some time in the interim (9)
I believe the answer is:
meanwhile
'in the interim' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for meanwhile that I've seen before include "On the other hand" , "In the interim" , "For the moment" , "in intervening period" , "In the intervening time" .)