12a. A container for a selection of chocolates etc. (3)
21a. A group of ferrets, or from the Old English for ‘anxiety’ a word whose early sense used to mean a state of being fully occupied, later commerce, industry or trade (8)
34a. Architectural structure whose arch/arches, in older examples, can be used to roughly identify the date of said causeway’s construction (6)
54a a female monarch or cat, a rock and originally with the Zanzibari lead vocalist, or the most powerful chess piece. (5)