i'm going to go with a bad distributor won't make any difference with the clutch, the clutch it's self doesn't have any sensor on it, there is the clutch switch (under the dash) but it shouldn't be connected to anything that would make it miss or stall... that being said, if it's covered in mud, wash it off before you do anything else, 1 of 3 things will happen, 1, the mud will wash off and everything will be easier to work on, 2, the mud is causing the problem, washing it off will solve it (unlikely) 3, the mud will come off and you will see something broken, hidden by mud
not sure what sensors are in the tranny though...
now that I think about it, if you have mud in your tranny that might cause this, did you check the fluid?