Bishop must return to queen's boudoir (5)

I believe the answer is:
bower
'boudoir' is the definition.
'bishop must return to queen's' is the wordplay.
'bishop' becomes 'B' (chess abbreviation).
'must return' becomes 'ow' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'to queen' becomes 'ER' (abbreviation for Elizabeth Regina).
'b'+'ow'+'er'='BOWER'
Can you help me to learn more?
(Other definitions for bower that I've seen before include "Anchor" , "Shady garden place" , "Garden space shaded from the sun by plants" , "Leafy shelter" , "shady area" .)
