Wife moved out of Twin Peaks, dreadfully dangerous place (8)
I believe the answer is:
snake pit
(Other definitions for snake pit that I've seen before include "Place characterised by disordered relationships; take nips (anag.)" , "Neat skip (anag) - place of ruthless competition" , "Skin tape (anag.)" , "reptile house?" , "Nest of reptiles" .)