You can still keep up the fight, even as you withdraw from battle.

Prerequisite: Int 13, Combat Expertise, base attack bonus 6+

Benefit: If you are taking a withdraw action, you may first make a single attack action at a –4 penalty. You may only move up to your normal speed this round. The attack must come before the movement.

Normal: When taking a withdraw action, you may move up to double your speed and may not take an attack action.