Related Clues:

• Rib ridge adds height for Moby Dick
• Knitting rib
• Corduroy characteristic
• Ridges-per-inch measure
• Rib of corduroy
• Corduroy line
• D.C.-born rapper with the 2013 hit 'Bad'
• One-named rapper with the 2015 #1 album 'The Album About Nothing'
• Rapper with the 2011 hit album 'Ambition'