Ruining her plans, creep in with stationery item (6,9)

I believe the answer is:

pencil sharpener

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'stationery item' is the definition.
The definition suggests a singular noun which matches the answer.

'ruining her plans creep in' is the wordplay.
'ruining' indicates anagramming the letters.
'her'+'plans'+'creep'+'in'='herplanscreepin'
'herplanscreepin' with letters rearranged gives 'PENCIL-SHARPENER'.

'with' is the link.

Can you help me to learn more?

(Other definitions for pencil sharpener that I've seen before include "Desk item" , "that makes lead go further" , "It's used to make a point" , "shaving device" , "something struggling writer might resort to" .)

I've seen this clue in The Daily Express.

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