Bludgeon (4)
'bludgeon' is the definition.
(cosh is a kind of bludgeon)
This is all the clue.
(Other definitions for cosh that I've seen before include "Blunt weapon, often of hard rubber" , "From this, blow" , "Heavy stick-like weapon" , "Sap" , "Club used as a weapon" .)
'bludgeon' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for cudgel that I've seen before include "Wooden weapon" , "Stout stick used as a weapon" , "Brutish club" , "Heavy staff, club" , "Batter" .)