1. A place offering ideal conditions for the growth of an idea etc. (6)
??T???
2. A feeling of regret for one's sins; repentance (9)
??????N?E
3. A person who is unscrupulously ambitious (9)
??????S?E
4. An ancient country in the East Balkan Peninsula (6)
T?R???
5. A fibrous protein that occurs in the outer layer of the skin and in hair, nails, hooves etc. (7)
??????N