No reason to do anything except hold your ground, 99% will back off as soon as they decide you are not going anywhere.
The 1%, wait until they make the first move, go from there, these things can not be pre-planned only reactive.
If your training is broad enough and steeped in experience this should not be much of a problem.
People who clinch typically want fight on the outside, that's why they clinch to keep you outside, I would most likely go inside and do throat damage.