20A In music, an individual group of five lines and four spaces used in staff notation (5). 21A A shallow area in a river that can be crossed by a car, etc (4). 23A An alphabetical list of persons, places, etc., mentioned in the text of a printed work(5). 28D In Greek mythology, the goddess of agricultural fertility and protector of marriage and women (7).
Don't forget the guidelines for posting a question which includes the request to give any letters you have. It's always nice to see some evidence of self-effort.