Centre, cure, cave

4. to hollow out a structure or landmass via digging into it (8).
7. a creature evolving from monkeys that lived in small caves (7).
8. to be done with care and attention (8).
9. the main focus of a place or thing, usually the most important (11).
10. a person who excavates and explores underground formations or landmasses (5).
12. to be unsure or anxious about oneself (8).

1. to think only of oneself, without any regard for the thoughts and feelings of others (10).
2. the central point of something, which is usually an unpleasant or difficult experience (9).
3. to focus on the centre of a topic or object or the topic or object itself (11).
5. a treatment that can be fixed, mainly used in a medical term (7).
6. to curve in to form a hollow (7).
7. to bring activities or jobs together in one place (9).
11. to take care of the feet and toenails via a cosmetic treatment (8).
13. to be safe and protected (6).
14. a hole in a surface which is used in a medical term to show a hole in a tooth (6).