Related Clues:
- Of advanced years
- Brought to mellowness, as cheese or wine
- Mossy
- Definitely not new
- 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
- Like a prized cabernet, say
- Like one born in 1920, now
- From long ago
- Having had many birthdays
- Passed one's prime?
- At an early stage — at a late stage
- Made it through another day, in a way