Making request in capacity of monarch (6)

I believe the answer is:

asking

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'making request' is the definition.
(I've seen this before)

'capacity of monarch' is the wordplay.
'capacity of' becomes 'as' (I can't justify this - if you can you should give a lot more credence to this answer).
'monarch' becomes 'king' (male monarch).
'as'+'king'='ASKING'

'in' acts as a link.

Can you help me to learn more?

(Other definitions for asking that I've seen before include "Questioning" , "Inquiring" , "Enquiring" , "Making request" , "being inquisitive" .)

I've seen this clue in The Times.

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