In The Land Of Leprechauns
This cache is located where you would normally look for leprichauns - if you are such-like inclined. There are many patrons of the nearby establishment that appear to seek out such activities after a round or seven of the good, thick, sticky brown stuff. They sometimes are seen even to converse with such fabled green individuals, often ending in solicitation for a four-leaf clover to improve their luck
Please note that this is a high muggle zone, so be extra vigilant before you seek out your conversation here and please replace - with camo - out of human sight
The D rating is because you cannot see the cache. I will put up a spoiler pic so that - when you are stumped - you can refer to it for help