I know what's wanted in the jocular answer, but in the absence of its meaning I'm struggling. It would be useful to know the letter breakdown of the 4 words. I can think of all sorts of ways of fitting the unches in, but none of them makes a sensible set of four words.
I have completed this grid except for the 4 word jocular unclued at 13d.
I'm afraid I cannot figure it out at all.....so perhaps have gone wrong somewhere.