15a Kitchen machine (9) P?O?E?A?R 63a Environmentally friendly (10) E?O?O?I?E? (Economised?) 51d Clammy (6) S?E?T? and 28d Prepare to prove one's ability to do well (2,2,4,6) Be on your M?T?L? (Mettle?) Thanks, don't know if all letters are correct, hope they are!!