Religious travellers (8)
I believe the answer is:
pilgrims
'religious travellers' is the definition.
(people on pilgrimage)
This is all the clue.
(Other definitions for pilgrims that I've seen before include "Travellers to holy places" , "Devout travellers" , "Wanderers" , "They travel to sacred places as acts of religious devotion" , "Travellers to sacred places" .)