ST Concise

[mra1]

This is a first to be stuck on this one - Kayakamina, Lie-in-King et al assistance please! 7ac (6) Imaginary idyll?A?A?? and 3d(4,2,7) unexpected problem solver D??? E? M?C?I?A ( I thought perhaps et machina but no exression springs to mind)

[HowardKennitby]

deus ex machina

[sandyRoe]

3 deux ex machina

[glasman]

Deus ex machina

[cupid04]

deus ex machina

[Lie-in King]

7a Xanadu
3d Deus ex machina

[sandyRoe]

deus is better ^

[mra1]

Thankyou gentlemen - you have come up trumps as usual! I have never heard that particular Latin expression before!

[AnnieJones]

3d: deus ex machina (a literary ploy to resolve difficult plot developments)
7a: Xanadu (Coleridge's opium-inspired poem of Kubla Khan's summer palace)

(I think!)

[fitzroy51]

deus ex machina is marked as the best answer many thanks for this information.