Chip away over time (5)
I believe the answer is:
erode
(Other definitions for erode that I've seen before include "Abrade" , "Eat away" , "'Deteriorate, wear away (5)'" , "Wear away with weather" , "Grind down" .)
I believe the answer is:
erode
(Other definitions for erode that I've seen before include "Abrade" , "Eat away" , "'Deteriorate, wear away (5)'" , "Wear away with weather" , "Grind down" .)