2663: CTRL+SHIFT+S

The ten unclued lights comprise five pairs, as implied by the title. Elsewhere, ignore one apostrophe.

        Across

   1    Leaves evening party, returning by church (8)

12    Rag Conservative, reluctant after defeat (10)

13    Sad rake unpleasant with no love in sight (6)

15    Nice No. 1’s changed, according to singers? (8)

18    Where the result of perks may be enjoyed (6,3)

19    Calais etc unexpectedly austere (9)

25    Maori dance twice caught cycling shorts (6)

27    Footballers clutching tight back ligaments (6)

29    Ditch possible outcome of amusing quip (2-2)

30    Yvette, now and then one chilly sort? (4)

32    Resorts across Channel sent back nationals (9)

34    Elbow hit with a bat is weakened (2,1,3,3)

37    Hiding nothing, ecclesiastical court and Catholicism show pattern of feelings (8)

38    Our Lady inspiring disciple’s work in stone (7)

39    Covered with shrub, black and wide (6)

40    He repeatedly passed around mug (6-4)

42    WW2 commandos placed rearward stopping most of staff retreating (8)

         Down

   1    Admin personnel in firm create unknown effect on TV (9)

   3    Delicate element of self-indulgence (5)

   4    Imminent order – truncheon deployed (5,3,6)

   5    River I associate with Wellington? (7)

   6    Dirty paving stone that’s found on clean beaches (4,4)

   7    Panned NHS for derelict wards? (6-8)

   9    King I see with bishop (4)

10    Decree tree should stand on island (6)

11    Duck Princess heard (5)

16    Violently eject Shakespearean character (5)

17    Expert rosarian’s top maple (4)

21    Old spectacles, maybe round, worn by girl, OK (5,4)

24    Met article turned aside when head of Vice retires (8)

28    Infantile blunder involving adult past (7)

31    Extremely earnest male checks intermittently cut mains gas (6)

34    Democrat blocking violent dictator’s government (5)

36    Bones well raised on both sides of scapula (4)

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