Deliberate objective - a lake (11)

I believe the answer is:

intentional

'deliberate' is the definition.
(synonyms)

'objective a lake' is the wordplay.
'objective' becomes 'intention' (I've seen this before).
'lake' becomes 'L' (geographical abbreviation).
'intention'+'a'+'l'='INTENTIONAL'

(Other definitions for intentional that I've seen before include "Deliberate" , "Done on purpose" .)

I've seen this clue in The Daily Express.

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