Crossword Genius

Origin, it's said, in regular journey (5)

Ross

I believe the answer is:

route

'regular journey' is the definition.
(I've seen this before)

'origin it's said' is the wordplay.
'origin' becomes 'root' ('root' can be a synonym of 'origin').
'it's said' indicates a 'sounds like' (homophone) clue.
'root' is a homophone of 'ROUTE'.

'in' is the link.

(Other definitions for route that I've seen before include "Way, course" , "The way to get somewhere" , "Path taken" , "Way, line" , "Course to destination" .)

I've seen this clue in The Telegraph.
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