Boisterous, loud (5)
I believe the answer is:
noisy
I believe this clue is a double definition.
'boisterous' is the first definition.
(similar in meaning)
'loud' is the second definition.
(associated in meaning)
(Other definitions for noisy that I've seen before include "Making much sound" , "Full of disturbing sounds" , "Rowdy" , "Raucous" , "like thirteen [HARD ROCK]" .)