London newspaper's plagiarisms, for example (6)

I believe the answer is:

thefts

I'm a little stuck... Click here to teach me more about this clue!

'london newspaper's' is the definition.
'theft's' can be an answer for 'newspaper's' (The FT - Financial Times). I'm not sure about the 'london' bit.

I don't understand the rest of the clue.

Can you help me to learn more?

(Another definition for thefts that I've seen is " Larcenies".)

I've seen this clue in The Guardian.

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