1: Note vehicle in picture puzzle (5)
4: Its a firm, small lettuce (3)
6: Be amusing for Matilda (7)
7: English painter whose work is arresting ... (9)
9: Furies, in ancient Greece or Ireland? Certainly! (7)
11: Fathers start to applaud, in afterthought (3)
12: All the performers express disapproval about it (5)