[MunchkinMan]

If you're not a Cleric, you couldn't take a Cleric-only Item because you can't use it. And, the card says you may discard something (not switch out) of your own before taking the new Item. This means that you can discard an Item that would be in the way of you using the Item you take, but again, if you couldn't use the new Item for some other reason (not the right Class/Race/gender, most likely) it won't make the difference between winning and losing, so you couldn't take it anyway.