Related Clues:
- Celebrates birthday after birthday
- Marks another birthday
- Immense spans
- Becomes dated
- Gets 16-Across
- Matures a long time
- Stores in an oak cask, say
- Makes wine "fine"
- Numbers on some birthday cards
- Working to bring game opponents together for long periods
- Improves, as steak
- Gets ripe
- It's been a long time since know-alls lost the head
- Immense stretches of time
- 10 and 8 for Bart and Lisa Simpson, respectively