Fast-moving (5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fast-moving</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 rapid that I've seen before include "Brisk" , "Speedy, quick" , "Happening quickly" , "Precipitate" , "Express" .)
(Another definition for pacey that I've seen is " smart".)