Serving in household, however large, royal home included (9)

I believe the answer is:

butlering

'serving in household' is the definition.
(working as a butler)

'however large royal home included' is the wordplay.
'however' becomes 'but' (I've seen this before).
'large' becomes 'lg' (abbreviation).
'royal' becomes 'er' (abbreviation for Elizabeth Regina).
'home' becomes 'in' ('he's home' can mean 'he's in').
'included' is an insertion indicator.
'er'+'in'='erin'
'lg' going around 'erin' is 'lering'.
'but'+'lering'='BUTLERING'

I've seen this clue in The Times.

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