Garish or noisy (4)
I believe the answer is:
loud
This clue is a double definition.
'garish' is the first definition.
(synonyms)
'noisy' is the second definition.
(associated in meaning)
(Other definitions for loud that I've seen before include "Deafening" , "Forte" , "Audibly, or visually, obtrusive" , "Raucous" , "strongly audible" .)