Knowledge, in a sense (7)

I believe the answer is:

insight

'knowledge' is the definition.
(insight is a kind of knowledge)

'in a sense' is the wordplay.
'a sense' becomes 'sight' (sight or vision is a sense).
'in'+'sight'='INSIGHT'

(Other definitions for insight that I've seen before include "Penetrative quality" , "Intuitive understanding" , "Clear or deep perception of a situation" , "Perspicacity" , "Sudden understanding" .)

I've seen this clue in The Times.

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