Possible Clues:

• Sites of some cosmetic surgeries
• They get sound of what's sent on ahead
• Mr. Potato Head pieces
• They sound as if they get sent
• 'On the face of it, they sound as if they get sent (5)'
• Fronts of planes
• 'That's the way, on the face of them, to make a me of sesame (5)'
• Smoke detectors
• What counters may count
• Leading airplane features?