Crossword Genius

Private hotel used by monarch (5)

Ross

I believe the answer is:

inner

'private' is the definition.
(thesaurus)

'hotel used by monarch' is the wordplay.
'hotel' becomes 'inn' (inn is a kind of hotel**).
'used by' means one lot of letters go next to another.
'monarch' becomes 'er' (abbreviation for Elizabeth Regina).
'inn'+'er'='INNER'

(Other definitions for inner that I've seen before include "Close to the centre; mental" , "Essential - most private" , "Situated inside" , "Interior" , "closer than magpie" .)

I've seen this clue in The Guardian and The Telegraph.
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