Cryptic Clues

ACROSS
1 Mark returned carrying a 500g weight (8)
9 Leaving no doubt after everyone gets signal that danger is over (3-5)
10 Postscript by saint describes what is used to catch someone's attention (4)
11 The straightening of teeth with thin cords? Too difficult (12)
13 Pagans in Hungary ate wild birds for example (8)
15 Most of the breed can be seen in this ancient land (6)
16 Animal skin reportedly from somewhere in Greater Manchester (4)
17 Some curious word for a weapon (5)
18 At first European adventurers sailed to where the sun rises (4)
20 Strangely blind about university city (6)
21 Royal princess found in waterway by church dignitary (8)
23 Being in the position to make a proposal about Ben, Ed comes back to Germany exceptionally keen (2,6,4)
26 Nothing to love in Mr Heath (4)
27 Maybe ten soldiers stand in front of new church door (8)
28 Workers going to Thailand indeed are crazy (8)


DOWN
2 Slay nine converts in an utterly senseless way (8)
3 What a poorly stocked paint salesman might become unexpectedly (3,2,3,4)
4 Toy snake without registered trademark (6)
5 Former England captain gets duck for county (4)
6 Assigned everything back to Ted (8)
7 Lied about food shop (4)
8 In favour of religious group embracing positive chance of success (8)
12 Unusual when eremites become the bearers of gifts (5,4,3)
14 A disciple of Zeno from Italy hides in Beds retreat (5)
16 Gas unfortunate greyhound without a bit of uncertainty (8)
17 Polish model nude for feature in the desert (4-4)
19 Prevaricate before working with English actor (8)
22 Kidnappers may ask for one from shocked Romans (6)
24 Flying mammals are crazy (4)
25 Changed colour and passed away I hear (4)