Part of France which Esio Trot 's first name comes from? (4)
I believe the answer is:
oise
'part of france' is the definition.
(Oise is a department of France)
'esio trot 's first name comes from?' is the wordplay.
'esio' anagrams to 'OISE'.
Though, I'm unsure how the anagram is indicated.
'which' is the link.
Can you help me to learn more?
(Other definitions for oise that I've seen before include "French department" , "part of France" .)