One runs Pinter plays in small rep at front (8)
I believe the answer is:
sprinter
'one runs pinter plays in small rep at front' is the definition.
I can't judge whether this defines the answer.
'pinter plays in small rep at front' is the wordplay.
'plays' indicates anagramming the letters.
'in' is an insertion indicator.
'at front' indicates taking the first letters.
The initial letters of 'small rep' is 'sr'.
'pinter' with letters rearranged gives 'printe'.
'printe' inserted within 'sr' is 'SPRINTER'.
Can you help me to learn more?
(Other definitions for sprinter that I've seen before include "Athlete" , "Fast runner" , "One moves quickly" , "one running" , "One runs a short distance at top speed" .)