Cryptic crossword No 3,251

Across

1. Weird liberal going crazier (6)
2. Rodman picked up crack (6)
3. Encourage quieter half to turn around (6)
4. Purified, calorie-free, and very low fat (4)
5. Sells birds (5)
6. Places flowers around necks in a pronounced manner (4)
7. Litter of piglets force arrival with a squeal (6)
8. A-ok accepting husband’s returned Kiwi donation (4)
9. Ultimately chase after gangster in my special footwear (8)
10. During tryout, director replaces unionist extra (8)
11. Dwarfs - roughly 50 species (8)
12. Loud Yank not the first naked jerk getting more loaded (6)
13. Drama queen's shifty lawyer covering nose primarily in cocaine (8)
14. Traverse Norwegian inlet without journal (4)
15. Records academy student rubbing shoulders with hobos (6)
16. Mark put away counterpart (4)
17. Ditching books, leased saxophone? (4)
18. Large investor won computer that spoke English (5)

Down

1. When recipe drops to the floor, stop Mrs. Lovett?! (5)
2. Hairstyle our group’s discussed (5)
3. Latin neighborhood calls for beer - so let it be hoisted! (7)
4. Democratic votes overlooking Conservative cancellations (9)
5. Classified case of investigation over princess held up in southeast (6)
6. Look through book with lines initially excised (6)
7. Sniffles holding back shopworker before the holidays (3)
8. Adult site lost licences (9)
9. Uncanny ring departs dimension (3)
10. One way or another, ordinary writer taking part in performance (7)
11. Fish regularly on vacation across America (3)
12. In Idaho, spud's coming up in a month (3)
13. Periodically scoop a lot of coal for winter warmer? (5)
14. Sensation of coffee lingers within (7)
15. Hot Rex's uncontrolled urges (7)
16. Wildcat nicked child - put to death (5)