I wasn't intending to unless that's what the Wiki definition characterizes it as, because I simply tried to re-express that definition without using the terms map and territory in ways that their definitions exclude.

I think perhaps I can see the problem. My phrase "for the purposes of causal explanation" is ambiguous. I wasn't meaning "as a way of explaining any particular behaviour" but rather "as a way of establishing the root causes underlying any behaviour". Does that make it more acceptable/less "greedy"?

Another possible cause of misunderstanding is that I have never seen the point of essentialism, in other words I think the questions that matter are always "how can something be most usefully described (for some stated purpose)" rather than "what is the essence of that something", so I instinctively avoided an essentialist definition. I'll think about rewording my version in a way that essentialists will recognize, as the sort of reductionism we are talking about does seem to hinge on reality being a sort of Platonic essence...