Yes there is clear Carnival Glass. It is clear (crystal) base glass with a pastel iridescence that shows light pink, green gold tones. (For information, marigold Carnival is also on clear base glass, but the iridescence is "orange").
It is not often seen, but Imperial, for example, did make some clear Carnival. If the iridescence is frosted, then it becomes white Carnival.
I haven't seen an item like yours before - and it's fascinating. What a super "find".