Across 7 Nut of any of various walnut trees having a wrinkled two-lobed seed with a hard shell (6) 8 Become tight or as if tight (6) 9 A large and densely populated urban area; may include several independent administrative districts (4) 10 Exercising influence or control (8) 11 A facial expression characterized by turning up the corners of the mouth; usually shows pleasure or amusement (7) 13 A strong emotion; a feeling that is oriented toward some real or supposed grievance (5) 15 Be at an angle (5) 16 An extended social group having a distinctive cultural and economic organization (7) 18 Wood used for fuel (8) 19 A limited period of time (4) 21 An instance of travelling by air (6) 22 A person who amuses others by ridiculous behaviour (6) Down 1 A car driven by a person whose job

is to take passengers where they want to go in exchange for money (4) 2 A reference work (often in several volumes) containing articles on various topics (often arranged in alphabetical order) dealing with the entire range of human knowledge or with some particular speciality (13) 3 A learner who is enrolled in an educational institution (7) 4 An opposing military force (5) 5 The manner in which someone utters a word (13) 6 (used of living things especially persons) in an early period of life or development or growth (8) 12 Having or involving or consisting of more than one part or entity or individual (8) 14 Behave in a certain manner (7) 17 A flour mixture stiff enough to knead or roll (5) 20 Building that contains a surface for ice skating or roller skating (4)