Related Clues:
- Knock on wood
- Done on ___ (without contract)
- Detail in a builder's plan
- Ludacris' music
- Architect's detail
- Building plan, for short
- Put words to music, in a way
- iPod playlist contents, perhaps
- Some writers work on it
- 50 Cent piece?
- Tech. detail
- Design detail
- Music genre and this puzzle's theme
- Blueprint datum
- One of hip-hop's sounds