Work hard to refashion rivets (6)

I believe the answer is:

strive

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'work' is the definition.
(thesaurus)

'hard to refashion rivets' is the wordplay.
'rivets' anagrams to 'STRIVE'.
However, I am unsure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for strive that I've seen before include "Rivets (anag)" , "Make great efforts" , "Exert much effort" , "Vie, contend" , "Try hard to break rivets" .)

I've seen this clue in The Irish News.

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