Cryptic crossword No 3,796

Across

1. Freed, let out again? (8)
2. Immediately simultaneous! (2,4)
3. Development with large gain (8)
4. Exhibit in church, meaning to convert (6)
5. First by mouth, taking one drink (8)
6. Attract some authentic elders (6)
7. Things like decapitated molecules (8)
8. Rector in a state at sea (6)
9. Post is deadly (8)
10. Stops, holding nothing, and bends down (6)
11. Staggered when look returned by journalist (6)
12. Desperate Custer having runs in rush to be brought back to life (11)
13. I leave sepia splotch in copies, making attempts to pacify (8)

Down

1. Recordings of tigers fighting over food (13)
2. Guide to Anthropocene? (6)
3. Dry press, nice in the middle (6)
4. Snobs sit awkwardly in crossing over (8)
5. Crushed can in bundle provides counterweight (7)
6. Uplifted, but verbally destroyed (6)
7. Tools for cooking, unless it goes wrong (8)
8. Try lure after every other cast (7)
9. Thaw when peacekeeper releases broadcast (8)
10. Component chromosome of plant (7)
11. Pays back senior, time held up! (6)
12. Controlled sound of waterfall in the past? (7)
13. Decide price insiders charged (8)