Purpose of ointment to exclude old and married (6)

I believe the answer is:

intent

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'purpose' is the definition.
(synonyms)

I cannot understand how the remainder of the clue works.

(Other definitions for intent that I've seen before include "Meaning -- determined" , "Mean to" , "Focused" , "'Purpose, aim (6)'" , "Purpose under canvas" .)

I've seen this clue in The Hindu.

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