Possible Clues:

• Animal that carries its young in a pouch, like kangaroo
• Animal in a pouch
• Beginning with the planet up in Australia
• 13 across is up to having a pouch to start with
• An animal like the kangaroo, female with a pouch for carrying young
• There's little in one's pouch
• Bandicoot, perhaps, wrecking puma's lair
• Animal god aloft, one completely lacking tail
• '____ Sue' (children's book about a kangaroo)
• Bats maul pairs of koalas typically