Do another trip travelling (2,3,4)
I believe the answer is:
on the road
'travelling' is the definition.
(on the road is a kind of travelling)
'do another trip' is the wordplay.
'trip' is an anagram indicator.
'do'+'another'='doanother'
'doanother' is an anagram of 'ON THE ROAD'.
(Other definitions for on the road that I've seen before include "as a commercial traveller?" , "in car" , "way to travel" , "Travelling (like Jack Kerouac?)" , "accompanying The Travelling People?" .)