If you’re still looking for something like this to be done I’d be glad to help. You’re looking for something like the little circular ‘(x)’ button on the right of the search field to clear it.
That could easily be done for example by using a little javascript and some CSS magic to overlap a fairly standard button on top of a normal autocomplete field. The button gets the Id of the search field and when clicked, it clears that search field. Simple and it should work.
I wouldn’t go out of my way to rebuild a search field renderer just for that small feature. Better just hope it gets added to skuid somethime in the future 
Hope this helps somebody!
