Boisterous laugh (6)
I believe the answer is:
guffaw
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">boisterous laugh</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 guffaw that I've seen before include "Laugh boisterously" , "A loud vulgar laugh" , "A loud uninhibited laugh" , "coarse laughter" , "Laugh heartily" .)