I can see this happening with an in house job. I've lived this full-time and continue to do so as I work a part time in house job and full-time as a freelancer.

But (and please don't take this the wrong way) if you're working directly with clients and this ends up happening a lot, I think it's a sign that something is wrong with your process(es).

Specifically, the look at the early communication processes between you and the client. This where you first figure out if you're a good fit for them and their project. Then, if you are, you clearly define expectations, goals, the process for reaching those goals, and the agreement on the scope of work to meet those goals. This process probably needs to be improved. That's probably true of 90% of designers, including myself.

Then, if things start to go off track (which will be less likely because you've already set up such clear communication form the start), you circle back to your original clearly defined agreements and plans and offer good solutions.

Do yourself and your clients a huge favor and (if you haven't already) get Design is a Job and read it as soon as possible.