Crossword Genius

An outlaw let out of the bag (4)

Ross

I believe the answer is:

tell

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'an outlaw' is the definition.
(I know that disallow is a is a more specific form of the action of outlaw)

'let out of the bag' is the wordplay.
'out of' is an anagram indicator.
'the bag' becomes 'l' (I can't explain this - if you can you should give a lot more credence to this answer).
'let' anagrammed gives 'tel'.
'tel'+'l'='TELL'

Can you help me to learn more?

(Other definitions for tell that I've seen before include "Notify" , "Issue instructions" , "Count - give an account" , "Peach" , "work in a bank" .)

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