For an ID Groove feature, the Clearance attribute is not used for the exit point. For safety reasons, by default the center line of the tool (holder plus exposed insert) is withdrawn exactly along the center line of the Groove, for example:
ID Groove feature
Entry point, determined by the Clearance attribute
Exit point
Center line of tool (holder plus exposed insert)
You can override this and control the retract point precisely using the Endpoint attribute. This image shows the same example, but with an Endpoint set at :