Rites in the form of essays (5)

I believe the answer is:

tries

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

'essays' is the definition.
(essay can mean to try or attempt something)

'rites in the form' is the wordplay.
'rites' can be anagrammed to 'TRIES'.
But, I am not sure how the anagram is indicated.

'of' acts as a link.

Can you help me to learn more?

(Other definitions for tries that I've seen before include "Attempts" , "Scoring moves in rugby" .)

I've seen this clue in the Evening Standard.

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