Tweet in which chapter welcome bishop to London? (7)

I believe the answer is:

chirrup

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'tweet' is the definition.
(I know that tweet can be written as chirrup)

'chapter welcome bishop to london?' is the wordplay.
'chapter' becomes 'c' (abbreviation).
'welcome' becomes 'hi' (both are greetings).
'bishop' becomes 'rr' (abbreviation for Right Reverend).
'to london?' becomes 'up' (I can't justify this - if you can you should give a lot more credence to this answer).
'c'+'hi'+'rr'+'up'='CHIRRUP'

'in which' is the link.

Can you help me to learn more?

(Other definitions for chirrup that I've seen before include "Cheep" , "Noise of a small bird" , "Bird's noise" , "Sound of small bird" , "Bird's sound" .)

I've seen this clue in The Times.

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