Crucial 

yes

 

back to you

Clue:

 

I hear the interlace entered with a pause. Oh so desirable, but unreactive.

(8 letters)

platinum?

Yep, tis yours.

quickie:

 

befuddled, a concerned itch, halved, collapsed into folds (12)

Corrugations?

no, it's a verb

Concertinaed?

over to you countess