I was talking to my friend today, shes heard of Rahan and been there once before but shes never heard of a Clover Hill there. However, I was researching a document i my homepalce in a document from 1749 the other day and it mentions several townlands I've never heard of. Apparently people around here used to live further down the fields instead of up by the roads and only came up to live by the roads in later years. So there was several small townlands further down but the names stopped being used because no one lived there anymore. It coulld be something similar with your Clover Hill. Maybe check out Griffiths Valuation(askaboutireand) and the Tithe Applotment Boooks(national archives), both online for free, to see if you locate your Payne ancestors in Offaly. There might be a mention of Clover Hill.
My friend says Rahan has a small village with a lot of surrounding countryside and farms.