2698: Au pairs

Fourteen unclued lights comprise seven pairs.

Across

7 Looked for nothing when leader makes a U-turn? (6)

12    Medical instruments deal with something breaking old cast (9)

13    Maybe Queen’s speech is without purpose, on reflection (5)

15    Shot bird left, eaten by parasite (9)

16    Twins, perhaps extremely amoral, notable (6)

21    European dictionary contains chestnut for ‘imitated’ (6)

22    Wasted new mortgage in Scotland (6)

24    Coterie didn’t regularly boast duke (2-5)

27    Cut shaft, losing line (3)

28    Bird’s bone uncovered (3)

32    Think ancient Persian priests will stop in east (7)

33    Times introducing trendy revolutionary snack (6)

34    Port that iså red (6)

38    Press release before opening of enormous...