Cryptic crossword No 3,673

Across

1. Fellow below southern supporters (7)
2. A huge trouble for biblical woman (7)
3. Idiot primate with head halved? (6)
4. Redirecting some foreign US number that's unknown (6)
5. Castles with spikes behind father (7)
6. Cooler, iron-plated cryptic grid (6)
7. Steals drinks (7)
8. Drunk tent mates making promise (9)
9. More food...s? (7)
10. Enterprise finally unites, revealing issues (7)
11. Business choice takes time (9)
12. Way to conceal large eye bump (4)
13. Called a cut broadcast (8)
14. Tell American learner: "Easy!" (8)
15. Fine from the cinema overturned (4)
16. Only naughty around troublemaker (6)

Down

1. Eat before partner (7)
2. Non-analogue dial controlling half of GitHub (7)
3. Fancy seat ready for Christian celebration (6,3)
4. Fabricated news in a cryptic (4,2)
5. Male on stage, hiding one doubt (10)
6. Worked together, not charged (9)
7. Vessels cannot rise at sea (10)
8. Sauce recipe not used during fast (5)
9. Originally, cheese contains fruits (7)
10. Conflict after ignoring Republican lie (7)
11. Cycling old legends (5)
12. Team's editor is retiring (4)
13. Suspicious bits of highly inappropriate item on conveyor (5)
14. Grass herbivore served up (4)
15. Everyone in gathering, excluding outsiders (3)
16. Leader quits biggest show (6)
17. Stick man (5)