Right to flourish leaving society (6)

I believe the answer is:

proper

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'right' is the definition.
(synonyms)

I don't understand the remainder of the clue.

(Other definitions for proper that I've seen before include "Correct in behaviour" , "Suitable and correct" , "Fit; accurate; decent" , "Appropriate description" , "Fitting and correct" .)

I've seen this clue in The Hindu.

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