Probably in-clan slang for something. When i switched clans i noticed some people use differend words for CoC tactics and strategies. Like for example funneling/clipping, luring/pulling, cleaning/rehits etc.
never heard bout clipping.
I prefer 'to pull', may just back from MMO tanky times...
but yeah, some clans use their own slangs, same on directions of attack, some define clocklike, others cardnial points.