Wear away - Crossword Clue, Answer and Explanation

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

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

This is the entire 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.
(synonyms)

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 Daily Mail, The Guardian and The Telegraph.

'wear away' is the definition.
(abrading is a kind of wearing 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 Star Tribune, the King Feature Syndicate and The Times.

Wear away (5)