Related Clues:
- Not a spring chicken
- Stale, say
- Like a joke told far too often
- '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
- From long ago
- Having had many birthdays