20ac - police officer or fashion icon (4) - ?I??
21d - ruling accepts article will cause some reaction (7) - ??A???? - first letter is last letter of 20ac
28ac- directions needed on river to get past it (6) - ?E?I??
30ac - a small pen could be crown property (6) - ?Y?N??
Help appreciated with explanations. Thanks in advance
Hen Hen