More clamorous (7)
I believe the answer is:
noisier
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">more clamorous</span>' is the definition.<br/ ><span class="explanation-format__explanation">('noisy' can be similar in meaning to 'clamorous')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for noisier that I've seen before include "Perhaps more disturbing" , "Louder" , "More of a racket" , "Less quiet" , "more deafening!" .)