Walk or run on street (6)
I believe the answer is:
stroll
'walk' is the definition.
(stroll is a kind of walk)
'run on street' is the wordplay.
'run' becomes 'roll' (rolling is a kind of running**).
'on' says to put letters next to each other.
'street' becomes 'st'.
'roll' after 'st' is 'STROLL'.
'or' acts as a link.
(Other definitions for stroll that I've seen before include "swan" , "Gentle walk" , "Walk in a leisurely way" , "A pleasant and leisurely walk" , "Saunter in no particular direction" .)