One who travels widely (12)
I believe the answer is:
globetrotter
'one who travels widely' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for globetrotter that I've seen before include "One who travels widely" , "Harlem basketball 17" , "Widely travelled tourist" , "seasoned traveller" , "Wide-ranging traveller" .)