Rattling noise (7)
I believe the answer is:
clatter
'rattling noise' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for clatter that I've seen before include "Repeated rattling noise" , "Rattle" , "noisy commotion" , "(Make) a rattling noise" , "Loud rattling noise" .)