Answer:

plonk

AnswerCrossword Clue
PLONKPlace (down) heavily: Var.
PLONKDrop suddenly: Var.
PLONKCheap wine, in Britain
PLONKCheap wine, in British slang
PLONKDrop heavily
PLONKCheap wine, in slang
PLONKOld piano's sound