Rich travellers (3,3)
I believe the answer is:
jet set
'rich travellers' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for jet set that I've seen before include "Moneyed crowd who travel in fast planes" , "High fliers" , "International crowd" , "High-fliers flying high?" , "Rich, fashionable people who travel widely for pleasure" .)