Worth resetting the timer (5)

I believe the answer is:

merit

I'm a little stuck... Click here to teach me more about this clue!

'worth' is the definition.
(I know that worth can be written as merit)

'resetting the timer' is the wordplay.
'timer' anagrams to 'MERIT'.
Though, I am not clear how the anagram is indicated.

Can you help me to learn more?

(Other definitions for merit that I've seen before include "Rate" , "Advantage" , "Excellence, worth" , "Worth; deserve" , "Quality deserving reward" .)

I've seen this clue in the Evening Standard.

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