Coffee Break Cryptic

5 September

Across

1 Stiff young man hoarding diamonds (4)
3 In the morning wild boar is heavenly food (8)
9 Joint in road caused annoyance (7)
10 Rotter requiring small drink (5)
11 A boxing match, more or less (5)
12 Comprehend six feet (6)
14 Companion introduced to right sort of plant (6)
16 Outlaw taking shelter in mountain kingdom (6)
19 Cave reached when going over river (6)
21 French city scroll, illegible in part (5)
24 Completely vertical (5)
25 Spot new clerk clad in iron (7)
26 Neglected matters go by this governing body (3,5)
27 Prepare to publish current returns (4)

Down

1 Marine crustacean, a sort of lean crab (8)
2 Wild dog hiding out? Not entirely (5)
4 Fielder I'm about to remove (3-3)
5 Some ignore site for further examination (5)
6 Extend trip away from home (4,3)
7 Be an accomplice in Lincoln, ending in court (4)
8 Gay bishop, supple and graceful (6)
13 Does this take the boredom out of saving? (8)
15 Many stir drink excessively (7)
17 He hugs tree — time for protection on top (6)
18 Child's beginning to get tender chest (6)
20 Expressions of gratitude and disapproval are forbidden (5)
22 Popular as starter for dinner (5)
23 Second postman in a row (4)