Coffee Break Cryptic

30 December

Across

1 Principal nut (4)
3 New chap sure to buy something (8)
9 Judges playing conkers? (7)
10 Bar returns from riotous feast (5)
11 Smooth learner enters the ring (5)
12 Silent characters sign up (6)
14 Money we got back for nut (6)
16 Tools needed for a quarter of the deck (6)
19 Capital city taking back a famous inventor with love (6)
21 Majestic and terribly large (5)
24 Wild dog kept in a building overseas (5)
25 A sign that visitors aren't welcome (4,3)
26 Ship's officer with many sailors (8)
27 Feat unaffected by revolution (4)

Down

1 Book that's difficult to endorse? (8)
2 Capital invested in Joan of Arc casually returned? (5)
4 Invisible nun wandering around diocese (6)
5 Song arranged by Carlo (5)
6 Did save, somehow, as recommended (7)
7 They wriggle in a creel sometimes (4)
8 Pet for Dorset leader in Dorset resort (6)
13 Ladies to gather round, being cut off (8)
15 Showing taste in unusual material (7)
17 Someone who carries drink? (6)
18 Jill's partner gets alien garment (6)
20 A payment for a coral island (5)
22 Geoff's beginning to wander in a small wood (5)
23 The first man a woman married (4)