8D Tired old PM's turned up at end of day (6) ?L?E?Y
18A First half of ribbon's colour scheme (5) ??C??
18D Doctor's beginning test, injecting son on the back (6)
24A Perhaps scrape enough runs after start of recovery (7)
25D A group of dramatists and violin - makers (5) A???I
28A some tackling posh car's maintenance (7)
thanks