Judged to tread incautiously (5)

I believe the answer is:

rated

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'judged' is the definition.
(rating is a kind of judging)

'tread incautiously' is the wordplay.
'tread' can be anagrammed to 'RATED'.
But, I'm unsure how this is indicated.

'to' acts as a link.

Can you help me to learn more?

(Other definitions for rated that I've seen before include "Scolded, estimated" , "deserved" , "Graded by trade" , "Was worthy of" , "Tread (anag.)" .)

I've seen this clue in the Evening Standard.

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