Go on hike (6)
I believe the answer is:
ramble
I believe this is a double definition.
'go on' is the first definition.
(I've seen this before)
'hike' is the second definition.
(thesaurus)
(Other definitions for ramble that I've seen before include "Go as fancy leads" , "Walk for pleasure or stray from subject" , "Walk; be discursive" , "Walk as leisure activity" , "Take a country walk" .)