Related Clues:

• The way beer gets past its best
• Beer found on the street is no longer fresh
• Least (anag.)
• Old; musty
• Flat from overuse
• Less than fresh
• Flat, as pop
• Dry, as bread
• Needing an airing-out
• Past its sell-by date, perhaps
• Some of his talent is no longer fresh
• No longer yummy
• Needing to be aired out, as a basement
• Dusty, fusty or musty
• Like bread made into stuffing, perhaps