Dean, do you want to remove the whole bearing race (the whole headset), or just the bearings?
If you just want to remove the bearings (which are held by the clip you mentioned) then simply pop the clip out with a narrow/pokey tool - Although it looks like you have sealed bearings, so unless you have replacements there isn't much advantage to doing this. Beware though, if they're not sealed then ball bearings could go everywhere.
If you want to remove the whole bearing cup (headset) then follow Rusky's advice as above.