Cryptic crossword No 3,650

Across

1. Flush toilet amid early signs of bowel movement (5)
2. Technical college to replace university in one-off procedure (9)
3. Lead messenger to east of facade (5-4)
4. Join one with spouse at last (5)
5. American following behind guard (9)
6. Top-rated Queen song (3)
7. Fixes up parts of this crossword perhaps (5)
8. Deep author's behind popular numbers (9)
9. Demand king's removal of crown by decree (5)
10. Island in Pacific linked to a prison (5)
11. One party entertained by Neil, busy as a bee? (9)
12. Greatly outranking the average on the scale? (5)
13. Input devices monitor footprints (9)
14. Red state supplying protection for jobs - no humbug - in recession (5)
15. Subtle hints of golden yellow on most of bird (5)

Down

1. Arab's clothing - primarily black article (4)
2. Send Buzz over to us after night (10)
3. Excellent fruit mother served up for delicacy (8)
4. Made cool hit covered by Cream? (4)
5. Concealed weapons firstly fired against Scottish PIs (6)
6. Liquid colour of blueish hue (4)
7. I originally altered the source for proof (10)
8. Won F1 race driving with Ford (7,3)
9. Middle of fastball struck by a great batter swinging in strike zone? (6,4)
10. Mischief about South American city's showman (10)
11. Weep softly to band member behind closed doors (6)
12. French Christian who founded a house of worship rejecting outsiders without "the right heart of Christ" (4)
13. Side one shared in meal before noon (4)
14. What one might do to record initial time leaving watch (5,3)
15. Senior International defends greedy trade put up for instrument (10)
16. Second sign of Aztecs found under pronounced Native American city (4)