Related Clues:
- Thanks be given first for letter from Greece
- Graduate's written about alien constellation's second star
- Character between alpha and gamma
- Bit of crime scene evidence
- Blueprint with four bases
- Building block, of sorts
- FBI identifier
- Code letters
- Heredity helixes
- Second letter of Greek alphabet
- Personal matter?
- 'CSI' evidence, often
- Old 48-Across rival
- VCR format
- Phi follower?