1 Territories ruled by a prince (14)
10 Greek first letter (5)
11 Alertness (9)
12 Woods (7)
13 Hole in the nose (7)
14 Alewife fish (5)
16 Diocese (9)
19 Beau (9)
20 A type of marsh plant (5)
22 Subtleties (7)
25 Condiment (7)
27 Not remembered (9)
28 Dens (5)
29 Sins (14)
Down
2 A theatre company (9)
3 Approaches (5)
4 Not able to be seen (9)
5 A noble gas (5)
6 Magic tricks (9)
7 Not outer (5)
8 Varnish (7)
9 Type of basket-making fiber (6)
15 Awful (9)
17 Water deposits (9)
18 Given off by uranium (9)
19 Gain (7)
21 Most aged (6)
23 Heart artery (5)
24 Forest god (5)
26 Ragout (5)