Trail tours, catching a source of entertainment (7)
I believe the answer is:
traipse
'trail' is the definition.
(thesaurus)
'tours catching a source of entertainment' is the wordplay.
'tours' becomes 'trips' (both can mean journeys or voyages).
'catching' is an insertion indicator.
'source of' indicates taking the first letters (the start - or source - of the word).
The first letter of 'entertainment' is 'e'.
'trips' placed around 'a' is 'traips'.
'traips'+'e'='TRAIPSE'
(Other definitions for traipse that I've seen before include "make slow progress" , "long tiring walk" , "Tedious walk" , "laborious walk" , "travel wearily" .)