Could you cast Reduce on a giant skeleton?

@JeremyECrawford @jaa0109 @imnotasnowflake Could you cast Reduce on a Giant Skeleton, animate it and then drop Reduce?

— Aron Greenspan (@DrawDiscard) March 15, 2016

Changing your size doesn't change your creature type. A little giant isn't a humanoid; it's a giant. #DnD https://t.co/U1fKvo48aJ

— Jeremy Crawford (@JeremyECrawford) March 15, 2016