0tterbot wrote:
hello,

we have some sort of poxy creeper, which mats underground & then comes up in
short clumps.

We really need a photograph.

Sounds like bridal veil creeper. The rhizome is like a string of
sharpish 1/2"+ beads strung on one end and they can form enormous mats
under the ground. I've picked up 1 metre square ones in infested bushland,

If it is that, the above ground comes from a thinish green string size
shoot that breaks off easily. No point in spraying it as it doesn't take
enough poison back underground to kill it.

Long term careful digging of rhizome is the best way,

Caveat, in the bush, I've taken out multiple layers, 2" deep first year,
4" deep next year, 6" deep third year and a few deeper.

But as I said, lets see a photo if you can. Hopefully it is something else.