CRYPTIC CROSSWORD

Down 1. Wise man from the “Alabama Giants” (4) 2 & 5dn. Conventional fifth realm here making a tester of emissions (13,6,7) 3. Of the stars! Horror! All ET’s phoned home and are back inside (7) 4. Patrick goes to church for insignia (5) 5. See 2 6. Get grime for sand dropper (3,5) 12. Unstable person I trounce accidently (8) 14. A figure to bury in, for example (7) 17. Last of muffin Alan ate (5) 20. Edward goes to General Electric to gain an advantage (4) Across 7. Edible timber? (6) 8. Retaliate in Geneva (6) 9. Kingz - 1, Wests - 1. First draw for the NZ native (4) 10. Surprisingly, icy atoll in the vicinity (8) 11. An African Anglosaxon in disguise with no sox! (7) 13. Broach impala to find a monkey inside (5) 15. Rumba country (5) 16. Unchanging attire (7) 18. Playing coin & dice tricks at the same time (8) 19. A Roman dies around the 15th of March (4) 21. Secret service catch ill mannered person and get stridulating organ grinder (6) 22. Opener gymnast has lots of animation (6)