Crossword Genius

One particular fine place to accommodate me informally

Ross

I believe the answer is:

fusspot

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'one particular' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.

'fine place to accommodate me informally' is the wordplay.
I cannot quite understand how this works, but
'fine' could be 'f' (abbreviation) and 'f' is located in the answer.
'place' could be 'spot' ('spot' can be a synonym of 'place') and 'spot' is located in the answer.
The remaining letters 'us' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for fusspot that I've seen before include "One who gets worked up" , "Finicky person" , "Hard-to-please person" , "Nervously agitating type" , "Old woman" .)

I've seen this clue in The Telegraph.
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