All answers will begin with Con.
-1. Con + edge; brink = Come together. 8 letters
2. Con + irk; annoy = Curving outwards. 6
3. Con + grip; purchase = Shortened form. 11
4. Con + indication; pointer = Deliver; remit. 7
-5. Con + camping shelter = Satisfied. 7
-6. Con + stroke to start play in racket sports = Protect (from harm). 8
7. Con + safety device (in electrical appliance) = Bewilder. 7
8. Con + examination = Competition; tournament. 7
9. Con + display of gratitude or respect = Play a part in. 10
10. Con + order (of operation) = Result; outcome. 11
