Possible Clues:

• Might be traces of how one responds
• Just traces of the way one responds
• Perhaps one has a re-play
• Does a double take, e.g.
• Traces of the way one shows one's feelings
• Responds to stimulus (6)
• How one makes some responses to a crest
• Is this how one makes a response to the bits of play
• Plays again, perhaps, for one hundred among the rest
• Plays once more, perhaps, and caters for it