there's no release clip. the bulb is in there pretty tight. Sometimes a dental pick works well for getting behind the bulb to help pop it out, but make sure the button is pressed to have the lamp off, because if the dental pick shorts the terminals out you'll pop the fuse and it's a ***** to reach the fuse in the fuse box....don't ask how I discovered that one LOL!
Oh and remove the whole mirror from the visor, it's 1 phillips head screw, then the bulb assembly pops off the mirror assembly. Close the mirror assembly to turn the bulb off while you swap it, just dont let it hang by the leads, they break off easily and you'll have to re-solder them. Again don't ask how I found that one out too LOL.
Last tip, and best one I've heard yet, an easy way to get the bulb out with very little to grab on to, get a piece of clear packing tape, and tape the bulb, then you can pull on the tape to pop the bulb out.