Hate being tested and failing? (6)

I believe the answer is:

detest

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

'hate' is the definition.
(to detest is to hate or loathe)

'tested and failing?' is the wordplay.
'tested' can be anagrammed to 'DETEST'.
Though, I am not clear how the anagram is indicated.

'being' acts as a link.

Can you help me to learn more?

(Other definitions for detest that I've seen before include "Despise or loathe" , "Dislike heartily" , "Not like" , "Deplore" , "Dislike intensely, loathe" .)

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