Wear (4)
(Other definitions for sport that I've seen before include "Recreation, play" , "Physical activity" , "Wear, display (an item)" , "Eg, cricket" , "form of exercise?" .)
'wear' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for erode that I've seen before include "Abrade" , "Become ground down or deteriorate" , "'Deteriorate, wear away (5)'" , "go to pieces!" , "Gradually wear away" .)
'wear' is the definition.
(I know that fray is a kind of the wear)
This is the entire clue.
(Other definitions for fray that I've seen before include "Chafe" , "Unravel at an edge" , "Unravel at the edges" , "Suffer peripheral damage" , "Show effects of strain" .)