Tropical cyclone (7)
I believe the answer is:
typhoon
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">tropical cyclone</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that typhoon is a type of tropical cyclone)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for typhoon that I've seen before include "(Chinese) storm" , "Violent storm - WWII aircraft" , "Storm, cyclone" , "Pacific hurricane" , "severe blow" .)