Harshly loud (7)
I believe the answer is:
raucous
'harshly loud' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for raucous that I've seen before include "Loud and discordant" , "Shrill - strident" , "Rough and discordant" , "Noisy and harsh-sounding" , "Unpleasantly loud and harsh" .)