Dashes ------ (7)
(Other definitions for runs that I've seen before include "Jogs" , "Points scored in cricket" , "Moves fast" , "Manages" , "ladders" .)
'dashes' is the definition.
('hyphen' can be a synonym of 'dash')
This is all the clue.
(Another definition for hyphens that I've seen is " Punctuation marks in compound words".)