Related Clues:
- 'A-Levels? I'd swot!' - possibly that's traditional 'wisdom'
- Senile
- Wild clematis
- Of advanced years
- 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 very old bread
- From long ago
- Having had many birthdays
- At an early stage — at a late stage
- "... at the ___ ball game!"