Cricket score (3)
'cricket score' is the definition.
(runs are scored in cricket)
This is the entire clue.
(Other definitions for run that I've seen before include "On the . . . - fleeing from pursuit" , "Enter a race" , "Move fast or manage" , "Flow; function" , "Compete in race or election" .)
(Other definitions for six that I've seen before include "Number of bowls in a cricket over" , "Maximum cricket hit" , "larger boundary" , "Half a dozen" , "Number of US moon landings" .)
(Other definitions for four that I've seen before include "Square root of sixteen" , "10 cleared of misuse of fortune" , "Cardinal" , "Number in quartet" , "Rowing boat; number" .)