Group noticed horse eating article (4)

I believe the answer is:

gang

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'group' is the definition.
(a gang is a group of people)

'noticed horse eating article' is the wordplay.
'noticed horse' becomes 'gg' (geegee or GG is a childish term for a horse. I am not sure about the 'noticed' bit.).
'eating' indicates putting letters inside.
'article' becomes 'an' (indefinite article).
'gg' enclosing 'an' is 'GANG'.

Can you help me to learn more?

(Other definitions for gang that I've seen before include "Group; clique" , "Crew, band" , "Group (crazy or criminal?)" , "Group of thugs" , "Band of delinquents" .)

I've seen this clue in The Irish Times.

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