Take a liberty? (7)

I believe the answer is:

enslave

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

'take' is the definition.
The definition and answer can be both to do with social activities as well as being verbs in their base form.
Maybe they are linked in a way I don't understand?

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for enslave that I've seen before include "Subject to servitude" , "Put into bondage" , "Dominate" , "Bring into servitude" , "Deprive (someone) of liberty" .)

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

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