2678: Winning words

Four unclued lights are of a kind and the remaining four can be arranged to indicate what unites them.

Across

1               Woman with vintage Italian dress in racecourse (8)

6               Attack mischief maker with plastic gnu (6)

10            Electrical components in versatile robots (12)

11            Almost all wickerwork repelled essential oil (5)

13            Vehicle levy I back, largely, in a roundabout way (7)

14            Ordered Horse & Hound (3,3)

16            Domain name in health app (4)

17            Have no connection with bachelor at first formal (5,3)

23            Keats unsettled after a tea for audience is uncertain (2,5)

25            Resin starts to leak across carpet (3)

28            Meadowsweets in part of church spanning beginning of aisle (7)

29            Sprinklers in some boats (8)

34            Crooked tutor can snitch (8)

35            Astonish with short trick (4)

36            Wants a different language (6)

38            Australia? Not a large country? (7)

39            Drink in extremely strait-laced place (5)

40            Hint about cryptic clues in notes gives some clarity (12)

41            River monster is after me! (6)

42            Old navigation aids remaining on ship (8)

Down

1               Celebrity panel at three o’clock? (9)

2               Perhaps creative writing and drama making a comeback within constraints (4)

3               One knowing promoter of lawlessness in the past (6)

4               Recently discovered tofu expired (2,4)

6               Am I grey? Possibly, in pictures (7)

 8              Older woman artist taking narcotic produces high art (5,5)

12            Reposition fake tattoo (8)

15            After midnight, Carl and I foolishly used to fight vampires (6)

19            Look into disappearance of fish slice? (8)

20            Old Navy employee occasionally goes to another US retailer (6)

22            Odd dip seen at certain times of the month (4,5)

24            Can students’ union do it? It’s open to debate (8)

31            Cool beverage in quirky cafeteria, desperately far away (3,3)

32            Devotional afterthought – small donation to charity (5)

33            Passionate about taking run warm-up (5)

37            Thanks court for diplomacy (4)

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