Purpose revealed while camping (6)

I believe the answer is:

intent

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'purpose' is the definition.
(synonyms)

'while camping' is the wordplay.
'while' becomes 'in' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'camping' becomes 'tent' (I've seen this in other clues).
'in'+'tent'='INTENT'

'revealed' acts as a link.

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(Other definitions for intent that I've seen before include "wrapped up" , "7 Purpose; fixed (upon)" , "With mind fixed on purpose, concentrated" , "Eager" , "Purpose under canvas" .)

I've seen this clue in The Daily Express.

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