Trinkets notorious killer stashed in empty factory (8)

I believe the answer is:

frippery

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'trinkets notorious' is the definition.
I can't judge whether this definition defines the answer.

'killer stashed in empty factory' is the wordplay.
'killer' becomes 'ripper' (Jack the Ripper).
'stashed in' indicates putting letters inside.
'empty' says to hollow out the word (remove centre letters).
'factory' with its centre taken out is 'fy'.
'ripper' inserted within 'fy' is 'FRIPPERY'.

Can you help me to learn more?

(Other definitions for frippery that I've seen before include "Unnecessary ornament" , "Tawdry finery" , "Something of little value or significance" , "Showy ornament" , "Trifles" .)

I've seen this clue in The Irish Times.

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