Here are the possible solutions for describing a notably slim waist clue
Answer
Clue
Relevancy
hourglass
Clue
Describing a notably slim waist
Definition
an instrument for measuring the hours by the running of sand through a narrow neck
fab
Clue
Word before Four, when describing the Beatles, or Five, when describing Van Halen, or Fifteen, when describing a band I just made up with 15 awesome harpists