Cryptic crossword No 2,177

Across

1. Grid son networks (4)
2. Criminal the dude Han recruited  (10)
3. American soldier infiltrating group English command (6)
4. Inactivity saint dismissed as a connection through the Father's line (8)
5. Capital a sad scum abandoned (8)
6. Freight train carrying the right stuff? (3,5)
7. Home game showpiece for Greek final (5)
8. Dance for all to see but forbidden to Māori  (4)
9. Book scherzo rhapsody regularly  (4)
10. Tender finish snubbed for outgoing President  (5)
11. German with one grand had remedy (8)
12. Apes drinking drops of ambrosian nectar in treetops (8)
13. Code copyable at heart following talk describing atrocious scene in Syria (8)
14. Piglet on TV, chilly on the radio (6)
15. Small sad hacks on Aldersgate Street (4,6)
16. Petition Chinese army to protect East (4)

Down

1. Turned around heard this? (5)
2. Scramble egg Umma regularly needed wife for Ayatolla?  (5)
3. Indepth editorial piece is definite (3)
4. Game John initially and send to all on Snapchat (7)
5. Alter drape in church  (6)
6. Heard Prince Albert is negative (4)
7. Of lesser importance unless placed in front of school (9)
8. Frequently morose lady has a title (3)
9. In the beginning God ordered unions to intermingle after a rodent (6)
10. Cook left for Henry found on the staff? (4)
11. One pup barking "Let me in!" (4,2)
12. Simple friend deep down  (9)
13. Found in decadent garden that's lost (4)
14. Book one turned profit for                                                 (7)
15. Sodium found in a tree once looks like something else (6)
16. Song overdue on the grapevine (3)
17. Make limpet ultimately lost at sea  (5)
18. Some busy rialtos doing business here (5)
19. Wife bound by black belt at daybreak (4)
20. Written after a test (1,1,1)