Bishop lounged unsteadily in club (8)
I believe the answer is:
bludgeon
'club' is the definition.
(bludgeon is a kind of club)
'bishop lounged unsteadily' is the wordplay.
'bishop' becomes 'b' (abbreviation used in chess).
'unsteadily' indicates anagramming the letters.
'lounged' anagrammed gives 'ludgeon'.
'b'+'ludgeon'='BLUDGEON'
'in' acts as a link.
(Other definitions for bludgeon that I've seen before include "(Beat with a) heavy stick" , "Hit with a heavy club" , "Blunt instrument" , "Stick or club with a heavy end" , "Strike with a club" .)