Crossword Genius

It can be grand, virtual or whistle-stop (4)

Ross

I believe the answer is:

tour

(Other definitions for tour that I've seen before include "Pastoral people of East Africa" , "... de France is a multi-stage cycle race" , "Term of duty" , "Extended journey" , "Pleasure trip going from place to place" .)

I've seen this clue in The Guardian.
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