
1) Mythological horse 2) Mythological monster
Found on
https://www.crosswordclues.com/clue/nuckelavee

The nuckelavee, or nuckalavee, is a horse-like demon from Orcadian mythology that combines equine and human elements. Originating in Northern folklore and the most horrible of all the demons of the Scottish islands, its name may be a progenitor of that by which Satan is sometimes known, Old Nick. The nuckelavee`s breath can wilt crops and sicken ....
Found on
http://en.wikipedia.org/wiki/Nuckelavee
No exact match found.