Token authorising an engine-driver to proceed along a single-track line

Let's find possible answers to "Token authorising an engine-driver to proceed along a single-track line" crossword clue. First of all, we will look for a few extra hints for this entry: Token authorising an engine-driver to proceed along a single-track line. Finally, we will solve this crossword puzzle clue and get the correct word. We have 1 possible solution for this clue in our database.