Cryptic Clues

ACROSS
1 They may be used in deliveries of Foreign Office records after Rex gets caught (7)
5 Careless with son's shoes (7)
9 Concerning something done to gold when it is used in a nuclear power station (7)
10 Ancient Greek is simple (7)
11 Even now vitality is evident in this type of painting (5,4)
12 European nun abandonned on island exhibits boredom (5)
13 King George tours America following the Spanish composer (5)
15 At home with soldier secretly (2,7)
17 Mother's immoral act with German playwright (9)
19 Consume stewed tea at university (3,2)
22 Hospital worker runs off with Edward (5)
23 What a story teller might do with bent pins and one thread of a rope (4,1,4)
25 Jazz fan stops at first to look at something in the middle of the road (4-3)
26 Dull sailor breaks shin (7)
27 Time to rumble foreign acrobat (7)
28 A dignified elderly woman to cheat with Joker and Queen (7)


DOWN
1 Predict return of Rector to England's principal diocese (7)
2 Studying somewhere in Berkshire (7)
3 Praise enthusiastically when Old gets to fifty (5)
4 A ring isn't fashioned by squeezing (9)
5 Get rid of English social class (5)
6 Conditions I'd expect at the outset in the USA (9)
7 Chekhov visits Italy with a girl (7)
8 The first appearance of Phoebus in runes is problematic (7)
14 Move to a higher position and he'll make a lot of trouble (5,4)
16 Allowed Penny to change remit to Ted (9)
17 Max receives note about the first tailless animal (4,3)
18 A level of society art must affect (7)
20 Discovering tense motorists in Germany (7)
21 Cat god on the run (7)
23 Guide a young ox (5)
24 This missile is limited without a bit of napalm (5)