Possible Clues:

• Cut-price holiday destination
• Function briefly demanded healthy food
• Let us sound as green as such as firm as they
• Nasdaq listings, for short
• AMEX listings
• Lettuce variety a.k.a. romaine
• Industrial units: Abbr.
• Let us sound as if this might make them firm
•     Comedian Bill, for short
• Let us sound like this for the companies