Greek god in "The Name of the Rose" (4)

I believe the answer is:
eros
'greek god' is the definition.
(Eros is an example)
'the name of the rose' is the wordplay.
'rose' can be anagrammed to 'EROS'.
Though, I am not clear how the anagram is indicated.
'in' is the link.
Can you help me to learn more?
(Other definitions for eros that I've seen before include "Cupid, son of Aphrodite" , "Arrow shooter" , "Group of instincts" , "Statue of love-god in Piccadilly Circus in London" , "asteroid four hundred and thirty three" .)