Not a positive view of European lake? (9)

I believe the answer is:

constance

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'european lake?' is the definition.
(Lake Constance in central Europe)

'not a positive view' is the wordplay.
'not' becomes 'con' (I've seen this in other clues).
'a positive view' becomes 'stance' (I am not sure about this - if you are sure you should believe this answer much more).
'con'+'stance'='CONSTANCE'

'of' acts as a link.

Can you help me to learn more?

(Other definitions for constance that I've seen before include "European lake" , "she has taken" , "Lady < of the Lake" , "Girl" , "gave delight to Mellors" .)

I've seen this clue in The Independent.

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