My BIG (5" thick) Webster's dictionary of the English language does list: Tucker = Food (Australian Slang), as the 5th usage.
My smaller (half as thick) Webster's New World dictionary of the American language does not make that listing.
Somewhere, or somehow, I have come across that usage before, so it is understandable to me, though I don't believe I've ever used it myself.
I think from my memory it was, Tucker = Provisions, to mean Food!?!?
Once again, we see that we are two peoples, separated by a common language ...... ;c)