I can't find my Planxty tape to remind myself of what they do but the Wise Maid is only a 2 part reel (possibly with variations second time round). From memory, Planxty do something like this. They play an 8 bar lead in of their own from the Jolly Beggarman to the Wise Maid which is bars 3 to 10 in my example and then they go into the Wise Maid which I have written as 2 A's and 2 B's

Jon