1- 8 1s set, cast 1 place and turn RH 1½ times
9-16 1s cross up to dance reels of 3 on own sides
17-24 1s Adv&Ret, 2s+1s+3s dance DoSiDo
25-32 1s dance Double Triangles with 2s+3s
(MINICRIB, Dance Crib compiled by Charles Upton, Deeside Caledonian Society, and his successors)
It is usually defined as a small village lacking a church, post office, or other formal building. Their origin is unknown, but it is likely that they are of a very ancient root, most likely dating to medieval times.
The Scots word derives directly from the Gaelic "Clachan" which means "Village" (or "Hamlet"); it should be pronounced as "Klachan" in English, with the stress on the first syllable and where "ch" is pronounced as in "loch".
With the same spelling, albeit with the subtly different pronunciation, "Klach~n" (where "~" represents the very short, indeterminate, vowel sound), "Clachan" also means "Stones"; the etymological association is obvious.
See Gaelic Dance Names for more information on Gaelic spelling and pronunciation.