Time Machine is the confusion... if you're not going to be using Time Machine, then the best way to do it would be to format GUID[GPT] with two user partitions, one HFS+, the other NTFS.
Then CCC & Acronis can each see & use the drive as native, each to their own partition.
One note: CCC will offer to repartition to put a Recovery partition on the external drive it's just cloned to. Let it do that first before you switch to Windows, just in case it does anything that the NTFS partition doesn't like. [It shouldn't, but safest to do it that way]
That way, in case of disaster recovery you could boot easily to Mac from the external Recovery Partition to restore.
Windows might be more difficult; I've never had to do a disaster recovery to bootcamp on a 'split' drive. Obviously booting from an Acronis recovery USB wouldn't work, as it wouldn't be able to do the correct partitioning; you'd probably have to set up a fresh Boot Camp & 'import' the Acronis backup to it.
Alternatively - I've just bought this for myself but haven't had chance to give it a full workout - Paragon Hard Disk Manager for Mac claims to pretty much be able to do the whole lot. As I say, I haven't yet tested it so it's not really a recommendation, just something probably worth a look.