Cryptic crossword No 2,143

Across

1. It's tough to understand that Canada Rock truth is horrible (1,4,3,2,5)
2. Piece of Djibouti snitch left unmoved (2,4)
3. Male cat enters the far side of the Milan plant 'Interred' (8)
4. An angle is off to begin with, or fully a taint exception (1,4,3,2,5)
5. At last a little, yum cocktail (10)
6. Bills patch test regularly (4)
7. Point out sink (4)
8. Pile containing broken curtain cutting (10)
9. Retreated when uh... bats went unwell (15)
10. Hearts of slugs did often include piercing pine from unripe apple, e.g (8)
11. Oddly sort bagged vegetable and asparagus shoots (6)
12. Associated in cringe content by mistake (15)

Down

1. Hydrogen plus first three Fluorine mixtures creates problem  (7)
2. Dare I say some prosecuting will be relaunching (9)
3. Nerves begin with national currency? (5)
4. Yonder bringing in lead characters of the 'American Town' drama (7)
5. Disharmonious broadcast of "Focus Tony" (3,2,4)
6. Baba half capped by alcoholic drink at Cuban dance (5)
7. Compassionate Lambert stuck in concrete  (7)
8. self-generated tote Lucia broke (9)
9. Carjacking and Self starting the first Ford truck (4-5)
10. London's west half's never ending groan at marathon (4,3)
11. Tidy up dropped bit of ugli that's unconsumed (7)
12. Storm ended race  (7)
13. 11 left in Eastern European eviction (5)
14. Verify without right surface (5)