I'm not sure if you want hints or just answers, so I'll start with hints.
53d. Abbreviation for 'promise to pay' + abb. for 'Euro, all reversed.
65a. Abb for 'troy' weight in a word for a court action, all reversed.
43d. A word for 'phone' + abb. for 'number' + alternate letters of 'ThEy'.