This isolated plant was growing in a wood of Fagus sylvaticus at an elevation of approx. 900 m. When the leaves are bruised or crushed, it gives of the typical smell of a Lamium. When I saw it I was convinced that it was a Clinopodium, what made me doubtful were the white blotches on the leaves. I was unabled to recall whether the Clinopodium has an aromatic smell or not! I would appreciate a second opinion.
I have a patch of natural Clinopodium georgianum on my property... (see pic) It smells like mint. I have no experience with your clinopodium, but I'd expect similarities.
Eureka! Thanks lila. It was the mottled leaves that made me doubt but then I put that down to possible nutritional- environment affects.
