Green’s Dictionary of Slang

to hit, to beat up; thus clatters, a smacking.

1922		Joyce Ulysses 730: The alarmclock next door at cockshout clattering the brains out of itself.
1935		G. Blake Shipbuilders (1954) 29: I’ll clatter ye one of these days, ye great , useless keelie.
1956		J. Curtis Look Long Upon a Monkey 190: He’s going to clatter you such a smack in the clock directly.
1996		(ref. to 1963) D. Healy Bend for Home 231: I’ll clatter you round the oxter.
2000		F. Mac Anna Cartoon City 45: You clattered my player.
2021		Breen & Conlon Hitmen 113: ‘Yer man [...] clattered him across the side of his head’.