Typhoon I can shed light on the difference since I've owned a custom club/component/fitting business for 20+ years. A clone is a head that is meant to simply look like a popular name-brand club, and it's generally made of lower quality materials and sold at a cheap price to a golfer who cares more about the look of a club than the performance. However, some clone heads actually do perform very well and they can be a decent option for someone looking for custom clubs at a dirt-cheap price. Some examples of clone brands would be Integra, Diamond Tour, GigaGolf, etc.
Component heads are different in that they aren't meant to directly emulate/copy any one particular name brand design, although they can often share similar design features. But they aren't intentionally designed to be "copies" of anything. Some components are original designs, and some are simply re-branded versions of open foundry models. And sometimes those open foundry models are made to stock factory specs, and other times the design is tweaked to a company's preferences (different specs, different materials, etc). Examples of component brands would be Hireko, Diamond Tour (they have several designs which are not clones), SMT, Alpha, KZG, Wishon, Maltby, etc.
When it comes to the Kirklands - they are not CLONES, but rather an open foundry design that is likely used by several other companies. They have a forged face, foam-filled hollow-body design, decent shafts & grips, they are actually very well-made clubs and I fully expect them to perform at the same level of other name brand clubs that cost 2-3x as much. Doesn't matter what it says on the back of it.
