Cryptic crossword No 4,102

Across

1. Paul periodically returned, wearing weapons, outraged (2,2,4)
2. Rei's lies occasionally annoy (4)
3. Play cut short? Drink! (4)
4. Show red card to wingers leaving nothing more to say (3,2)
5. Busy person entertaining at first in Liverpool -- maybe Paul? (6)
6. Busy people (6)
7. Inane, like PL thematically? (5)
8. Attention to bestow on father, finally, or mother maybe? (9)
9. Heron maybe on top of tree (5)
10. Kind of humour that, according to Amélie, is embraced by one old university society (7)
11. Sexy European switching tops, which causes problems on road (7)
12. Speed when start of bark replaces quiet shows how mad a dog can be (8)
13. Wolfgang runs after Paul, maybe, quickly causing commotion (4)
14. Maybe Paul's found in Cicero manifestos (5)
15. Till one lazily starts to topple over (4)
16. Paul, half-cut, reversed past ambassador's pile (4)
17. Born next to a kind of light (4)
18. Cheating to attain barely-passing grade in test (9)

Down

1. Have great respect for American Paul, maybe (6)
2. Past prime, finished: rest easy at end of life (8)
3. Maybe Paul, or Robert on vacation maybe, wandering (13)
4. My answer to nurse, spent at last: "maybe Paul?" (13)
5. Maybe Paul could be English, Irish, or Gordon (6)
6. Engulf Celt in a mess without care (10)
7. Maybe Paul in French coast to engage in nooky (8)
8. Seeing Paul with bottom half stripped near mythical city is worthwhile (4)
9. OK, thank you for deposit (6)
10. Showing no emotion, Rod resisted (5-5)
11. Tory to provoke loathing (8)
12. East of France, mountains divide (8)
13. Maybe, maybe, maybe decide after a day (6)
14. Easy excuse (4)