One waking you in inept hotels in error? (11)

I believe the answer is:

telephonist

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'one waking you' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.

'inept hotels in error?' is the wordplay.
'in error?' is an anagram indicator (I've seen 'in error' mean this).
'inept'+'hotels'='inepthotels'
'inepthotels' is an anagram of 'TELEPHONIST'.

'in' is the link.

Can you help me to learn more?

(Another definition for telephonist that I've seen is " Switchboard operator".)

I've seen this clue in The Times.

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