Wear away - Crossword Clue, Answer and Explanation

I've seen this clue in the Evening Standard, The Times, the LA Times, The Mirror, the USA Today, the King Feature Syndicate, The Star Tribune, The Telegraph, The Independent, the Universal, The Guardian, the Penny Press, the Newsday, the Sydney Morning Herald, The New York Times and The Wall Street Journal.

'wear away' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for fret that I've seen before include "Sort of saw work" , "Fog" , "Worry unnecessarily" , "Worry; or the marking on a guitar" , "Notes separator" .)

I've seen this clue in The Telegraph, The Daily Mail and The Guardian.

'wear away' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for fray that I've seen before include "Wear at the edge" , "Chafe" , "Wear away from rubbing" , "Battle - loose at the edges!" , "Become stressed" .)

I've seen this clue in The Telegraph, The Daily Mail and The Guardian.

'wear away' is the definition.
(I know that wear away can be written as gnaw)

This is the entire clue.

(Other definitions for gnaw that I've seen before include "Chew upon" , "Chew or crunch at" , "Wear away with the teeth" , "Chew at, work with teeth" , "Chew and grind down" .)

I've seen this clue in The Telegraph, The Daily Mail and The Guardian.

'wear away' is the definition.
(I know that abrade is a more specific form of the action the wear away)

This is all the clue.

(Other definitions for abrade that I've seen before include "Wear away by friction" , "Scratch" , "Scrape away, erode" , "Wear away by rubbing (6)" , "Wear away by rubbing, scrape" .)

I've seen this clue in the King Feature Syndicate, The Times and The Star Tribune.

Wear away (5)