So it varies, this name (4)
I believe the answer is:
otis
'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" .)