Violent gaming — it's a growing issue! (9)

I believe the answer is:

gigantism

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'a growing issue' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.

'violent gaming it's' is the wordplay.
'violent' indicates an anagram.
'gaming'+'its'='gamingits'
'gamingits' is an anagram of 'GIGANTISM'.

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I've seen this clue in The Times.

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