Possible Clues:

• State of one's hair after a night's sleep
• Daughter comes in to take cap off, revealing untidy hair
• Tousled hair condition
• Disheveled hair in the morning
• Tousled look of the recently woken
• Result of failure to comb the hair after sleep, maybe ... or a feature of 17-, 25-, 49- or 61-Across?
• Untidy waking-up hair condition, and what the first word of the answers to starred clues can be
• Messy morning hair