1a,one could clean up with such confection (6,4) --O--- Cake?
11a,the quintessential sly old jaguar(9) A-C-E-Y-E?
23a,this area in Wales is part of a sturdy federation(5) D---D
3&23d,grab a tree wrongly ,ans see stars here (5,4) --E-T,-E-R?
Any help with any of these would be gratefully appreciated