This is where wellywearer is really jumping off the deep end. This is a new clue type. The Poetic Description or PD is most closely related to the "Cryptic Definition" type of clue. But the answer is more described than defined. A PD looks like it could be a line from a traditional poem - so there might be some rhyming or alliteration. That doesn't mean non-PD clues can't look poetic!