China about to tip over, making loud noise (4)
I believe the answer is:
Here is my best explanation:
'loud noise' is the definition.
'china about to tip over' is the wordplay.
'china' becomes 'pal' (I've seen this before).
'about' becomes 'c' (abbreviation for 'circa').
'to tip over' says the letters should be written in reverse (I've seen 'tipped over' mean this).
'palc' in reverse letter order is 'CLAP'.
'making' acts as a link.