Cryptic crossword No 1,464

Across

1. Instant drink - stop the clock! (5,2)
2. Former leader gets blessing (7)
3. Leaders of sports club run a marathon to make tracks (5)
4. Double scripture: contract to put album out again (2-7)
5. Almost everything starts in this youthful institution (10)
6. Hymn: church outspoken (4)
7. Capital punishment for each issue ensures meeting runs to time (11)
8. The greatest parent (according to child), without hesitation: Spanish painter (8,3)
9. Activist 2 19 at home, gaining weight around the sides (4)
10. Straight talk: mankind will be 20 when she comes out of her well? (5,5)
11. Crooked Spooner’s frog in the throat - get in! (3,6)
12. Minor prophet, awful human (5)
13. Has more dialogue, run afterThe Dancing Cavalier, perhaps? (7)
14. Activist Charles buried German dude in earth (7)

Down

1. Sneeze out loud into snot rag? (6)
2. Upturned tram has in-house bird? (6)
3. Apply cream during outbreak of mumps at seasonal brat retreat (6,4)
4. Green is one of these parties lacking guts, concealing craft (5)
5. Speaker seized by escalating ambition stops, temporarily (9)
6. Damage flyer (4)
7. Bum relaxation, coming before 10? (2-6)
8. Prostrating, previously 50 in 21 (8)
9. Strange tears since opposition to flow (10)
10. Endless art: table's a mess when used for plaster powder? (9)
11. Chlorine's lost influence, after cigarette flush from hiding place (5-3)
12. Canister containing hydrogen not quite full, much obliged (8)
13. TV detective left with 21 Arthur’s dad (6)
14. Humiliated, head-first in equal dead-last (6)
15. Activist Medgar cut head to toe (5)
16. Reportedly, Chlorine mentioned elevated sub-continental culture (4)