Crossword Genius

Of a system where there's no turning back? (3-3)

Ross

I believe the answer is:

one-way

(Other definitions for one-way that I've seen before include "This street is single-directional" , "Street allowing traffic in single direction only" , "Single-directional like some streets" , "Not allowing reverse motion" , "Not allowing return motion" .)

I've seen this clue in The Guardian.
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