Possible Clues:

• Parroted
• Included elements of
• Came back safe and sound
• Repeated a sound
• Got a return from this, by the sound of it
• Repeated word for word
• This gave one a sound return
• 'Got some return from this, by the sound of it (6)'
• Breaking code, he made a resounding comeback
• That gave one a good return, by the sound of it