Fats WALLER (5), who has been called ‘THE BLACK HOROWITZ’ (40/37/1A), was born in NEW YORK (28) and died in KANSAS CITY (30/36). He was a reluctant ‘guest’ at CAPONE’s (16) 27th birthday party. SLOUCHY (22) and KEROSENE (43) combine to form an anagram of HONEYSUCKLE ROSE, while the title of the puzzle suggests AIN’T MISBEHAVIN’.