Bellowing (7)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bellowing</span>' is the definition.<br/ ><span class="explanation-format__explanation">('roar' can be a synonym of 'bellow')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for roaring that I've seen before include "& 1 Across Strong winds in S. Hemisphere" , "Bellowing, hollering" , "Sounding as a lion" , "Emphatic (success)" , "Making cry (like a lion)" .)