Say one realizes in hindsight that a question better fits another Stackexchange. How to close the one here to avoid cross-posting effects? Or.. is there another - better - route to take?
As the 'original poster' (OP) one can simply delete the question using the 'delete' link in its bottom-row moderation/modification menu. - Thanks @Steve Robillard for pointing that out (I should have found that myself.. t.b.f.)!
This does not work when external's have placed their footprint on it (such as up/down votes. In that case one could simply downvote one's own question (however I suspect that does not look good on one's StackExchange resume though ^^). - Thanks @goldilocks for pointing it out!
Chat a moderator
A moderator chat/request would do the trick too. - Thanks again @goldilocks!