5a spineless creature from familiar sea which isn't besiode America though it is in this case  ?e?u?a
13a girl turns back after article on key man in mechanical trade  a?l?n
24a from start to finish gains a stone on top  t?p??
29a X's that's more than enough of a clue  e?c???
11a might they be suitable as an afterthought to a poison pen letter  ?s?s
many thanks for any help