If what you draw to answer someone's question doesn't make sense, do you ever redraw? Is that an ok thing to do, if you really can't figure out what the first draw is trying to say?
Yes, it is ok.
There are no Tarot police, or rules that you must follow. The question really is if it is beneficial to do it or if there is a better way.
Opinions will like vary on that, I can give you mine, but also trust your instincts.
IF that happens where cards come up that you have no idea what they are trying to say, it can happen at times, the first thing I do is ask myself if I was paying attention when I was shuffling and pulling the cards. Or if I was overtired and went into automatic mode without thinking. If I really was not paying attention and forget the question, or something of that nature I consider it my fault and scrap the reading and start it over at a better time when my attention is up to par.
If that was not the case, then I presume the right cards came up and it is me who is not understanding them.
That leaves a few options. I can pull come clarifiers to explain the ones I did not get OR yes start over. If I decide to start over, I tend to ask the cards the question: "I did not understand what you are trying to tell me, could you please explain it to me again in a different way?"
That usually works. I tend to take note of what cards originally came up. With the clairity from the new reading, some of the original meaning may then become more clear. Sometimes at that point I do add in some of the elements that came up in the first one once I can see more what it was saying.
Babs