School article about singular individual doing readings (6)

I believe the answer is:

gasman

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'school article about singular individual doing readings' is the definition.
I can't judge whether this defines the answer.

'school article about singular' is the wordplay.
'school' becomes 'gam' (both can refer to a group of whales).
'article' becomes 'an' (indefinite article).
'about' is an insertion indicator.
'singular' becomes 's' (abbreviation in grammar).
'gam'+'an'='gaman'
'gaman' enclosing 's' is 'GASMAN'.

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I've seen this clue in The Guardian.

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