Related Clues:

• Belly down
• Pertinent
• Quick on the uptake
• Quite bright
• Flat on one's face
• Facedown
• Trustworthy
• Bldg. unit
• Mentally bright
• Perfectly suited
• It may be a walk-up: Abbr.
• Quick to learn
• Gifted
• Naturally disposed toward
• Facing downward