Train set in order for travellers (10)
I believe the answer is:
itinerants
'for travellers' is the definition.
(itinerant is a kind of traveller)
'train set in order' is the wordplay.
'order' indicates an anagram.
'train'+'set'+'in'='trainsetin'
'trainsetin' with letters rearranged gives 'ITINERANTS'.
(Other definitions for itinerants that I've seen before include "Travellers" , "Point and talk wildly in view of island" .)