1: We had this mad, self-destructive urge (5,4)

6: Unscripted part for head librarian (2,3)

9: Had to be infatuated (9)

10: Throw out faulty nib (3)

11: Arranged date in Cairo means extermination (11)

13: Reportedly is nostalgic for wife (3)

14: Finish suddenly, like an oboe? (1, 4, 2, 3, 3)

16: Prosecutor entering motion following air conditioning company manager's initial settlement (13)

21: About....about right? Wrong! (3)

22: Steer TS into alternative routes (4,7)

23: God, transforming first day into last night, was received (3)

25: Fresh ardor mellows outbursts on the highway (4,5)

27: Just conservative (5)

28: Open present yonder (4,5)

1: A French number that is Country or Jazz (9)

2: Venomous enemy lurks in Caspians (3)

3: Hot burnt residue is on hot pot (7)

4: Take Sominex, act half-blurry (7)

5: Has His Highness started cannabis? (7)

6: Also, pay somewhat slowly (7)

7: Arcking shot from Bill O'Brien (3)

8: Rings for the groups (5)

12: Original caliph adds brave face to UK/Arab struggle (3-4)

13: I filmed turbulent type of crisis (7)

15: Places and composition? (9)

17: Beatnik embraces nude in nightclub (7)

18: 21-across A lot of fuss about a trifling matter, according to Shakespeare? (4,3,5,7)

19: Watch Obadiah attend to customers (7)

20: Land filled with rain is OK (7)

21: Composer employed in hotel garage (5)

24: Draw a stomach uprising (3)

26: Without it, set call for recompense (3)