When repeated, gung-ho (3)
I believe the answer is:
rah
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">when repeated gung-ho</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 rah that I've seen before include "whoopee!" , "Cheer of approval" .)