Playing bugle, Don in club (8)
I believe the answer is:
bludgeon
'club' is the definition.
(bludgeon is a kind of club)
'playing bugle don' is the wordplay.
'playing' indicates an anagram.
'bugle'+'don'='bugledon'
'bugledon' is an anagram of 'BLUDGEON'.
'in' acts as a link.
(Other definitions for bludgeon that I've seen before include "Strike with a club" , "Thick stick with a heavy end" , "Blunt instrument" , "Stick or club with a heavy end" , "Club used as a weapon" .)