Noisier (6)
I believe the answer is:
louder
'noisier' is the definition.
('loud' is associated in meaning with 'noisy')
This is the entire clue.
(Other definitions for louder that I've seen before include "'Actions speak . . . . . . than words'" , "More noisy or bright" , "Noisier or gaudier" , "Sound of greater volume" .)