
1) Castle in Scotland
Found on
https://www.crosswordclues.com/clue/barmkin

Barmkin, also spelled barmekin or barnekin, is a Scots word which refers to a form of medieval and later defensive enclosure, typically found around smaller castles, tower houses, pele towers, and bastle houses in Scotland, and the north of England. It has been suggested that etymologically the word may be a corruption of the word barbican. The ba...
Found on
http://en.wikipedia.org/wiki/Barmkin

battlement or turret on the outer wall of a castle
Found on
http://phrontistery.info/b.html

Scottish term for defended courtyard of a castle. Also, the wall enclosing such an area
Found on
http://www.castles-of-britain.com/glossary.htm

A barmkin was a defensive enclosure built around fortified tower houses and bastles. They were large thick walls used to protect cattle and other livestock from raiders. Access to the enclosure as a whole was through bolted gates. They were mainly built in the 16th and 17th centuries. No surviving examples have been found in Northumberland, though ...
Found on
http://www.encyclo.co.uk/local/20766

the small walled yard attached to a pele tower (generally Scottish)
Found on
http://www.encyclo.co.uk/local/22129

the small walled yard attached to a pele tower (generally Scottish)
Found on
https://www.encyclo.co.uk/local/20402
No exact match found.