Hi again.
Terry, sorry, I didn't realise you wanted an answer. "carfax" is listed in Chambers as "a place where four roads meet". My comment about mobile communications was just a flippant throwaway.
Back to "An XXXX brewery makes good sense." (6-6) ... there's no anagram.
"brewery" in the clue is meant to mean something along the lines of 'fabrication' and/or 'concoction' and, as such, is probably not a correct use of the noun.
The answer contains two letter 'Y'.
JimC
P.S. To read better, I should have given the clue as "A XXXX brewery makes good sense" rather than "An XXXX brewery makes good sense" but this makes absolutely no difference to the wordplay and answer.