Related Clues:
- Definitely not new
- Well-established
- Requiring many candles on a birthday cake
- Grate, with 'get,' or what this puzzle's theme answers get
- With 21-Across, senescence
- Like most carbon-dating specimens
- Ancient as the hills
- Ancient internet provider, say, recalled within Germany
- From long ago
- Having had many birthdays
- At an early stage — at a late stage
- "... at the ___ ball game!"
- Like the man in a Hemingway title
- Long-standing generation out-of-date
- ___ Glory (U.S. flag)