15d) leaves France to be trained as button maker (5) N???E - is it Nacre?
17a) This rare object's seen at new auctioneers (5) ??R?O - is it Curio?
24a) Cover English novel edited by priest (7) E???L?P
25d) Vehicle, dark blue, nearly overturned (3) no letters
27a) Rulers, nasty sort, in confines of Damascus (7) D???S?S
Thank you in advance for your help.