I'm harmonising a tune I've written, in C major, and one chord which resolves to C major consists of B, Db(or C#), F and A. It seems to be a sort of tritone substitution, but I am struggling to come up with an appropriate name for it. There are several options, but their names all sound quite ugly. What would be the best name for the chord? What would be the reasoning behind your answer?
How embarrassing ! Don't know why A got morphed into another note. SORRY !!