28aThose who analyse (an ore, alloy etc) in order to determine the quantity of gold silver or other metal in it (8) ?S?A?E?S 17d Supermarket executive victim of a kidnapping in 1981 (8) ?E?D?N?? (Can only think of Don Tidey, but it doesn't fit) 27a Girl's name, popular in Ireland, from Celtic but influenced in form by Helen (6) ??L?E?