Possible Clues:

• Wriggled like viper without direction in the raw
• Using a buff envelope?
• How some sleep
• Kind of prey in a Cornel Wilde film title
• '... to go ___ is the best disguise': William Congreve
• With a Dane around, little Kay is 1 down
• T.Rex's debut hit
• Mailer's ''The ___ and the Dead''
• Blatant
• Frequent adjective for ''truth''