auld light

from The Collaborative International Dictionary of English v.0.48

Auld licht \Auld licht\, Auld light \Auld light\ . (Eccl. Hist.)
   (a) A member of the conservative party in the Church of
       Scotland in the latter part of the 18th century.
   (b) Same as {Burgher}, n., 2.
       [Webster 1913 Suppl.]