Crossword Genius

So it varies, this name (4)

Ross

I believe the answer is:

otis

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

'so it varies' is the wordplay.
'varies' indicates anagramming the letters.
'so'+'it'='soit'
'soit' anagrammed gives 'OTIS'.

'this' is the link.

Can you help me to learn more?

(Other definitions for otis that I've seen before include "Place of worship; side part of head" , "- - Redding (soul music star)" , "-- Redding, US singer" , "Lift man" , "Company providing lifts" .)

I've seen this clue in the Evening Standard.
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