A word of free meaning! (3)

I believe the answer is:

rid

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'free meaning' is the definition.
'rid' can be an answer for 'free' (synonyms). I'm not sure about the 'meaning' bit.

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

Can you help me to learn more?

(Other definitions for rid that I've seen before include "Free from something unpleasant" , "Free, relieve" , "Clear, remove" , "Disabuse" , "Free (someone of something unwanted)" .)

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