Thanks Calibax for mint.
Don't know anything about Llantrisant and hence no way to guess that the Royal Mint is located there.
Plus I had the wrong letter in the third position.
Used alternative spelling for the down clue to use N from mint.
Thanks slaney for Patte. That was the last cross I was looking for.
scorpiojo, thanks for papal but it was the answer at another location in the puzzle.