Family Drama / Romance
The "Clerk's Tale" is a narrative with a love story at its heart, but this love story is pretty different from what you might expect. You know the boy-meets-girl rom-com shtick. Can you imagine one in which the dude pretends to kill his kids just to test his squeeze's loyalty? That would sure be a million laughs...
The "Clerk's Tale" is focused on the "love" between Grisilde and Walter, but this love often seems more like duty and obligation than romantic love. After all, Walter uses the word "love" to describe the feeling he expects his vassal Janicula to have for him, and the absolute obedience he commands from Janicula looks very much like the obedience he gets from Grisilde out of her "love" for him.
Rather than being concerned with our modern notion of love, then, it might be more accurate to say that the "Clerk's Tale" is concerned with the bonds and feelings between husband and wife, things like duty, jealousy, obedience, or pity. That's why we can also call the tale a family drama—even more so in that it eventually focuses not just on the fate of Walter and Grisilde but on that of their children, and on the way the entire family is eventually reunited.