1. Obtained (3)
4. Therefore (5)
6. The person in charge (4)
7. Apex (3)
9. Pipe (4)
10. Strength (5)
11. Pack of cards (4)

Down

2. The other one from this (4)
3. A piece of poetry (5)
5. Prepared for publication (6)
6. Glad (5)
8. Free from contamination (4)