Rushing round bum hotel, making disapproving noises (11)

I believe the answer is:

harrumphing

'making disapproving noises' is the definition.
(to harrumph is to make a disapproving noise)

'rushing round bum hotel' is the wordplay.
'rushing' becomes 'haring' (hare can mean to run or rush).
'round' is an insertion indicator.
'bum' becomes 'rump' (synonyms).
'hotel' becomes 'h' (phonetic alphabet: alpha, bravo, charlie etc.).
'rump'+'h'='rumph'
'haring' placed around 'rumph' is 'HARRUMPHING'.

I've seen this clue in The Times.

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