PRIZE CROSSWORD
Across
6 Member of a proto-Protestant movement initially led by Oxford theologian John Wycliffe (7)
8 Berlin prison where Rudolf Hess was held until his death in 1987 (7)
9 Eastern European city, centre of a Rus federation in the 9th–13th century (4)
10 In medieval Britain, the chief means of communicating news (of plague, battle victories, royal births) to a community (4,5)
12 The oldest institution of higher learning in the US, established in 1636 (7)
13 Palestinian political and military organisation founded in the late 1950s by Yasser Arafat and others (5)
Portuguese fortress near the Spanish border, twice under siege (1810 and 1811) in
