Crossword Genius

I disapprove of that list - revealing quality of some online searches (7)

Ross

I believe the answer is:

boolean

'quality of some online searches' is the definition.
(logical notation used in search queries)

'i disapprove of that list' is the wordplay.
'i disapprove of that' becomes 'boo' (expression of disapproval).
'list' becomes 'lean' (I've seen this in another clue).
'boo'+'lean'='BOOLEAN'

'revealing' acts as a link.

(Another definition for boolean that I've seen is " sort of logic".)

I've seen this clue in The Independent.
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