4  Argue about King and Queen's employee (6)

 8  Investigates head of Trinity for Father Brown? (6)

 9  Perforation found in Warhol etching (4)

10 Determined to be published (3)

13 Safety experts touring Open University building (5)

15 Cover of urn in case is smashed (9)

17 I express hesitation after advertising space becomes costly (7)

19 Relative describes Conservative leader in story (7)

22 Crew with a German boss (7)

25 Intimate places I fondled (7)

27 Jolly time including soldiers in procedure (9)

29 Found a foundry? (5)

31 Regularly uproot grass (3)

33 Try starters of smoked haddock on toast (4)

34 Chance to observe gain by US index (6)

36 Poles providing accommodation for native American vet (6)

37 You maybe a lay preacher (6)

 1  Gets to dance in police station (7)

 2  Attack legal process (7)

 3  Notices a musician's instruction (3)

 4  Clubs formed by Hazel and Olive? (5)

 5  Pinch out the top of firm Mediterranean plant (3)

 6  I remove all lines from symbolic story (3)

 7  Editor's amendment retains 'on' in passage (6)

11 Simpler form of electrical device (6)

12 Dip a piece of organza in starchy substance (4)

14 Base man's stretching out (5)

16 Reportedly you see rector entering church (3)

18 Look up geological feature (3)

19 Benefits of sixth-form exam groups (6)

20 Almost disturbing sycophant (5)

21 American supports return of popular Welsh girl (3)

22 Police work on start of e-fit for face (6)

23 Nursemaid's expressions of surprise (4)

24 Headless steer in wood (3)

26 Elizabethan poet and preacher behind conflict (7)

28 Archaically separate English piece of meat (5)

30 Another chemical found in Alzheimer's disease (5)

32 Mathematical function returned telecommunications code (3)

33 Listen to Native American girl (3)

35 Diaries oddly overlooked anger (3)