Reply To: Symbol Question
That looks to be highlighting the half step between the A and the B flat. Be sure to check the surrounding text to clarify that.
When these occur, if they do indeed represent half steps, I will frequently use a word sign letter h (and/or w for the whole steps). I include a TN saying that the letter h in the music line represents the upside-down v (or wedge or however you want to call it) connecting the notes of the half step.