Geological rift (5)
I believe the answer is:
fault
(Other definitions for fault that I've seen before include "Flaw - defect" , "Shortcoming" , "Sin, error" , "Defect or imperfection" , "Defect or offence" .)
I believe the answer is:
fault
(Other definitions for fault that I've seen before include "Flaw - defect" , "Shortcoming" , "Sin, error" , "Defect or imperfection" , "Defect or offence" .)