Landlady in 'Hound' novel accommodating Sherlock, principally (6)

I believe the answer is:

hudson

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'landlady' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.

'hound novel accommodating sherlock principally' is the wordplay.
'novel' indicates anagramming the letters.
'accommodating' indicates putting letters inside.
'principally' indicates taking the first letters.
The first letter of 'sherlock' is 's'.
'hound' anagrammed gives 'hudon'.
'hudon' enclosing 's' is 'HUDSON'.

'in' acts as a link.

Can you help me to learn more?

(Other definitions for hudson that I've seen before include "navigator" , "New York river; Upstairs/ Downstairs butler" , "River in New York city" , "Rock -, - bay" , "American banker" .)

I've seen this clue in The Telegraph.

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