last 4
15A : A plot being given blanket coverage (4) : ?B??
23A : Assembled in meeting at her edifice (8) : ?A???R??
16D : Produce tie as he’d date arranged (4-4) : ??A?-??A?
24D : Accomplished fellow – second last of clues (4) : ??N? : is it ACNE
Many thanks in anticipation