MacLachlan of "Twin Peaks" (4)
I believe the answer is:
kyle
'maclachlan of twin peaks' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for kyle that I've seen before include "- - of Lochalsh" , "Narrow sea channel (in Scotland)" , "Narrow channel (Scots), rhymes with dossier" , "Transport system with floating trains" .)