Wear away - Crossword Clue, Answer and Explanation

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

'wear away' is the definition.
(I've seen this in another clue)

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 Daily Mail, The Guardian and The Telegraph.

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

This is all the 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 Daily Mail, The Guardian and The Telegraph.

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

This is all the 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 Daily Mail, The Guardian and The Telegraph.

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

This is the entire 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 Star Tribune, The Times and the King Feature Syndicate.

Wear away (5)