Cryptic crossword No 3,648

Across

1. Hinge damaged by tip of screwdriver and end of chisel? Language! (7)
2. Discarded PPE taken in by doctor with overdose (7)
3. Active old vagrant finds the good life (5,4)
4. Go downhill in miniskirt? (3)
5. Stagger when a cereal is picked up (5)
6. Surprise when wine's served after end of Mass! (5)
7. Lobby for fast car to avoid Home Counties occasionally (5)
8. Cardinal, when absent, breaking silence (5)
9. Debauched Saturnalia, no end of commotion in former penalty colony (9)
10. Corrupt beer-drinking cleric (5)
11. Degenerate, impudent, holding priest back (7)
12. Promiscuous ladies, perhaps, taking ecstasy (5)
13. That chap's song on the radio . . . (3)
14. . . . poor conductor ruins alto's broadcast (9)
15. One who chooses to be criminal, etc, in role reversal (7)
16. Personal problem with water supply cut off food processor (5)
17. Having no meter, no charge with 6? (4,5)
18. Bottom of Meadow Road? (5)

Down

1. Applause for guitar played by Ted (9)
2. Concepts cast aside (5)
3. Old beast's roar had us alarmed (9)
4. Composition removing rights from Franciscans, say (3)
5. Acoustically modify part of church (5)
6. Combination of Einstein's introduction with rule he calculated (5)
7. Sanction some counter-intelligence (3)
8. Passes online faux pas? (7)
9. Stand-in is in Paris, causing upheaval (7)
10. Where Bobby's concealed, possibly, went in disreputable parts? (5,4)
11. Advance propaganda before French king's overthrown (5)
12. Extravagance, essentially found in two flashy hotels (5)
13. Detestable, but don't hate them all! (9)
14. Risk for each current student (5)
15. Old Greek bread creating fuss round Switzerland - 'bread' being slang for money (7)
16. Who's nemesis, initially dangerous, armed, lacking essential kindness (5)
17. Accommodation deteriorating when temperature's dropped and Victor moves in (5)
18. Feverish, upset after short month (7)