Clawback

noun

1. A rule that permits a party to take back evidentiary materials that were mistakenly turned over to the other party but to which the other party would not have been entitled.
2. Money that a party is entitled to keep under one tax provision but is taken by another tax provision.
3. Any recovery of a performance-related payment based on discovery that the performance was not genuine.

   "The airline got a clawback provision in the event of failure of the engines to meet fuel-consumption targets."

4. A flatterer or sycophant.