Sounds interesting. I've got to ask, how did you ever discover that combination? I mean, was it accidental??
Hmm, does sound interesting, like it could actually work, although it's a crazy combination. The ingredients in A1 sauce are mainly Tomato Puree, Vinegar, Sugar, Salt, and Raisin Paste, with a little crushed orange puree and other spices. What if you just stuck with raisin paste, added a tiny hint of orange juice, and a few other spices? Worcestershire sauce is known to be used in some cocktails.