Cryptic crossword No 3,720

Across

1. Aces holding cat and dog (5)
2. Force blue on blue (5,4)
3. Article on East Central shows affection for stories (9)
4. Get stuck in house (5)
5. Ton Dudley's dismantled - I'll remember that (4,5)
6. Antipodean degree holder or setter (5)
7. Surround French bike found in English new piano (7)
8. Warlike knight replacing large alien (7)
9. Plant from south border (5)
10. Ruler dined, showing his state? (9)
11. Blade that can go in either direction (5)
12. Computer, it's cat's turn - cheers! (7,2)
13. Romanians displaced to elsewhere in Europe? (3,6)
14. Sequel heard alternately giving scientist (5)

Down

1. Sansa upset about Andre's fault (3,7)
2. Setter's pit (4)
3. Fundamental red number (8)
4. Models for and against characters (10)
5. Onward, ye soldiers, bearing colours (4)
6. Small cop, stripped of PC, is confused at winter event (6)
7. Poet is locked up, we hear (4)
8. Bonfire seen in gym across the year (4)
9. Led four in and existed (5)
10. Protest ignited particle, giving ruin (10)
11. Vessel for spirits? Yes, yes (5)
12. Ex-top miner runs amok - don't take my word for it (1'1,2,6) (10)
13. A child bedded into reed and pleaded (8)
14. Brutal war axe - it comes out the side of one's head (6)
15. Careless outbreak (4)
16. One heard to fix piano is found in a school? (4)
17. Beep when blimps lose small mass (4)
18. Dirt from scurrilous, inappropriate, licentious tales originally (4)