Principal railway between two places (8)
I believe the answer is:
mainline
(Other definitions for mainline that I've seen before include "Inject drug - principal rail connection" , "use drug" .)
I've seen this clue in The Irish Times.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free.
Check out my app
or
learn more
about the Crossword Genius project.