Cryptic crossword No 3,614

Across

1. US lawman beginning to heckle a speaker (8)
2. New Orleans, in the main, around for a long time (5)
3. Chilling with Cliff at end of holiday (5)
4. Former leader recalled part of speech about surprisingly zen husband (8)
5. Straps up briefly on cover again (8)
6. A lack of news surrounding First Lady's Tesla is a disappointment (3-5)
7. Duck into shed abruptly to get poison? (5)
8. Pet project of graduate, extremely ‘blue-sky’ (4)
9. Own love causing commotion (2-2)
10. Teacher's pal had cycled (6)
11. Prayers in Latin unsatisfactory (4)
12. Enliven government in Germany (6)
13. Athletic Society left close to bankruptcy (6)
14. In retreat hotel, very quiet and stylish (4)
15. Mrs Simpson allowed to lie about message (8)
16. Finish with talk in court (4,2)
17. Kay praises Dicky for socialising (5-3)
18. European tax returns covering prince living in exile (5)

Down

1. Relative overturned objection for domestic appliance (4-3)
2. Like some buildings are bordered (6)
3. Suspect there, girded for interrogation (5,6)
4. Right procedures, wrong parents (11)
5. Pressure on justification to take drugs before series of games (3-6)
6. Potential witness died leaving Midlands city after amorous advance (6-2)
7. Perhaps paintings are old-fashioned (3)
8. Helps with aches inside leg (7,2)
9. Revolutionary electronic band bringing comfort (8)
10. Ex-Chancellor is large, tedious sort welcoming knight (7)
11. Wandering nomad taking year to become energetic type (6)
12. Make sense of political party supporting bill (3,2)
13. Familiar Pulp Fiction star being exposed (3)
14. Maybe five seen here - mature, without a hint of wrinkles (5)