Hmmm, I wouldn't recommend doing it that way, that's asking for trouble. Most people would say leave the clip on unless you are doing a repair.
If it needs to come off, take the handguard off the rifle first. This is done by driving out a pin in the lower band. Once the pin is out, (may be a roll pin that is hard to see, but there's most likely a pin in there) carefully remove the lower band. Do you best not to oval the band when tapping it off.
Then the handguard can slide off. When it's off you can get much easier access to the clip and you should be able to get it off WITHOUT spanners. Hope this helps.