Mary lets loose just like a man! (8)

I believe the answer is:

masterly

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

'just like a man' is the definition.
I can't tell whether this definition defines the answer.

'mary lets loose' is the wordplay.
'loose' indicates an anagram (letters are loosened from their original positions).
'mary'+'lets'='marylets'
'marylets' anagrammed gives 'MASTERLY'.

Can you help me to learn more?

(Other definitions for masterly that I've seen before include "Highly skilled" , "Supremely skilled" , "World-class" , "Expert" , "Showing exceptional skill" .)

I've seen this clue in the Evening Standard.

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