Related Clues:
- Improve, as a blade edge
- Chew pig's tail with crackling
- Hard going by single file
- Perfect over time
- Perfect, as one's talents
- D, in an emoticon
- Ugly Casanova "___ Your Teeth"
- To mill
- On reduced allowance, writer's become more focused
- Fine tune
- Put a point on
- Brush up on, as a skill
- Refine over time
- Sharpen new garden tool outside
- Daily routine (with "the")