Crossword Genius

Train travel (4)

Ross

I believe the answer is:

rail

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">train travel</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>

(Other definitions for rail that I've seen before include "Protest strongly (at)" , "Water bird; bar" , "Supported bar - inveigh" , "Means of transport" , "20 backwards, that 7 runs on" .)

I've seen this clue in the Universal, the LA Times, The New York Times and The Wall Street Journal.
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