Related Clues:

• Sound quality
• The first 'H' of H.H.S.
• It's often toasted
• Fitness
• One's most valuable possession, perhaps
• Subject of many a toast
• It can be improved by 39-Across
• Well-being
• Fit condition
• Wellness
• Toast word
• Physical well-being
• Soundness
• Sound quality?
• Toaster's subject