The unclued lights are a small fraction of almost 800.

Across

12   Oilmen rail about petroleum product (7,3)

13   Came across religious instruction chapter consisting of verses (6)

14   Bleat including angry tirade for this plant? (7)

15   Tea urns of Salvation Army medic, very apt resources, say, for starters (8)

19   Et voilà! He’s poetry in motion (3,6)

20   Limit river level (4)

24   Father informally taking in socially acceptable northern islander (6)

27   Theatre alarms occasionally forbidden under Islamic law (6)

30   Endless source of irritation for god (4)

32   Medical specialist to bury benevolent creature with emotion at heart (9)

34   Skilled worker, salesperson, and aviator (9)

37   Tree feller’s a civic dignitary (8)

38   Wee juvenile with scruffy sty (7)

39   Somewhat disdainful son, smelling awful (6)

40   Join end to end quantities of cloth, final items (10)

Down

1 Upset Punjabi has memory that includes form of address (8)

2 Cold period I endured initially in prison (3,3)

3 Female cut short outsize income payments (5)

4 Calvinist ruse I dismantled, tending towards doctrine of salvation for all (14)

5 Check incorporating originally missing bit of chair (7)

6 Be buoyed up around beginnings of abnormal tidal bore in this? (8)

7 Perkier ex-con we sorted out in training scheme (4,10)

9 Bone’s dull snap after skinning (4)

10   Conductor’s racket (6)

11   Incarnation of backsliding renegade, a vice-admiral (6)

16   Sudden attack, part of dramatic tussle (5)

17   Cooked many a bird (4)

25   A Chinese weight of a similar character (4)

26   Repeated expression of surprise about school’s figure of speech (8)

28   Worried alto, GI with advanced ear problem (7)

30   Accepted beliefs, empty theories involving pity (6)

31   Bantu person, man with courage embodying energy and resistance (6)

35   Milton’s monk’s pan for cooking in oil (5)

36   Predict a star and constellation (4)

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A first prize of a £30 John Lewis voucher and two runners-up prizes of £20 vouchers for the first correct solutions opened on 10 August. Please scan or photograph entries and email them (including the crossword number in the subject field) to crosswords@spectator.co.uk, or post to: Crossword 2762, The Spectator, 22 Old Queen Street, London SW1H 9HP.