Way in which mister entertains king's sister (6)

I believe the answer is:

manner

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'way' is the definition.
(synonyms)

'mister entertains king's sister' is the wordplay.
'mister' becomes 'Mr' (synonyms).
'entertains' is an insertion indicator.
'king's sister' becomes 'anne' (I can't justify this - if you can you should give a lot more credence to this answer).
'mr' enclosing 'anne' is 'MANNER'.

'in which' is the link.

Can you help me to learn more?

(Other definitions for manner that I've seen before include "Demeanour" , "How something is said or done" , "Way or means" , "Way in which something is done" , "Way of acting or behaving" .)

I've seen this clue in The Guardian.

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