You defend your allies with uncanny expertise.
Benefit: When using the Interceptor trance, you can take a penalty to your Armor Class equal to the competence bonus granted by the Interceptor trance to grant a deflection bonus to Armor Class to one ally threatened by an enemy within your melee reach. In addition, when using the Interceptor maneuver, if your attack was successful, you can make a free disarm or trip attempt against the enemy struck.
Psionics Expanded: Advanced Psionics Guide. Copyright 2011, Dreamscarred Press; Authors: Jeremy Smith and Andreas Rönnqvist.