Possible Clues:

• Feet by the metre start at one in the morning
• A doctor getting one on one's feet
• A doctor is within two feet
• Feet of two syllables (one short and one long)
• I confront a GP putting iodine on feet
• Initially it's always measured by its feet
• Poetic metrical feet
• Animated creature with different head or feet
• Metric feet
• One little deer hiding head and feet