Crossword Genius

Travellers in train set out (10)

Ross

I believe the answer is:

'travellers' is the definition.
(itinerant is a kind of traveller)

'in train set out' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'in'+'train'+'set'='intrainset'
'intrainset' anagrammed gives 'ITINERANTS'.

(Other definitions for itinerants that I've seen before include "Point and talk wildly in view of island", "Travellers".)