Savoury snacks child tucks into, not the genuine article (9)

I believe the answer is:

pastiches

'not the genuine article' is the definition.

'savoury snacks child tucks into' is the wordplay.
'savoury snacks' becomes 'pasties'.
'child' becomes 'ch'.
'tucks into' indicates putting letters inside.
'pasties' placed around 'ch' is 'PASTICHES'.

(Another definition for pastiches that I've seen is " Pieces of art that imitate previous styles".)

I've seen this clue in The Guardian.

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