Acted as a beginner (5)

I believe the answer is:

cadet

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

'beginner' is the definition.
(I know that cadet is a type of trainee)

'acted as a' is the wordplay.
'acted' can be anagrammed to 'CADET'.
But, I am not sure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for cadet that I've seen before include "Military trainee officer" , "Trainee soldier" , "Officer in training" , "Junior officer; younger brother" , "One taking instructions" .)

I've seen this clue in The Globe and Mail.

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