1: Unscripted part for head librarian (2,3)
2: Perfect counter-spy equipment (3)
3: Piece of pottery containing drink to make beast tender (9)
4: Looking at a little monkey in glee (5)
5: Bend in the middle and wind back (3)
9: Many sound prospects for prospectors (5)
10: A heron regrets losing its wings (5)
12: Fool to join recital (3)