Rapids transit? (4)
I believe the answer is:
raft
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">rapids transit?</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for raft that I've seen before include "Simple boat" , "host" , "Flat floating craft" , "large collection" , "Vehicle" .)