Wren
All-powerful
All the answers contain the letter X, but not normally the first letter. The number of letters in each word is given. No.1 A former farm machine or dentist ( 9 ) No.2 Somewhere between male and female !! ( 9 ) No.3 A person playing this wind instrument ( 11 ) No.4 Underground river ( 4 ) No.5 The Second book ( 6 ) No.6 Name of a plant ( 5 ) No.7 People who complain grind these ( 4 ) No.8 This will make you run ( 8 ) No.9 Sounds like a duty on bad behaviour ( 6 ) No.10 These are included with fittings in house sales ( 8 )