Go on about walk (6)
I believe the answer is:
ramble
I believe this clue is a double definition.
'go on' is the first definition.
(rambling is a kind of going on)
'walk' is the second definition.
(ramble is a kind of walk)
'about' acts as a link.
(Other definitions for ramble that I've seen before include "Walk in the countryside" , "Wander where you please" , "Take a country walk" , "Leisurely walk" , "Go as fancy leads" .)