Possible Clues:

• Absence justification
• Flu, e.g
• The Italian's left with head cold perhaps
• I'm going to head to make complaint
• Calm after couple in front leaves complaint
• It may leave you weak in the knees
• Complaint I will put before the head
• Tablet has no power with head ailment
• Condition's calm, once stone's dislodged
• You'd be just as well without it