Possible Clues:

• Break down into components
• If you come to examine it, you'll find the girl sounds as if she's lying (7)
• Separate (something) into its component parts
• Break down
• Any seal (anag.)
• We hear girl is prone to think carefully
• If you examine it, the girl might be a 1 across, by the sound of it
• Break down to find the constituents
• Dissect, British-style
• Examine it and she's not telling the sound of the truth