Related Clues:

• Like a bassoon's sound
• Desirable, as a 36-Across
• Like dead weight
• Nonreactive, chemically
• Like the smell of success
• Like a dead weight
• "Nice!"
• 'Ni-i-ice!'
• Like some fillings (as in this puzzle's theme entries)
• Like the sound of oboes
• Sounding like an oboe
• Kin of "cool!"
• Hard to get a reaction out of?
• Like a noble gas
• Chemically unreactive