I had to get into the fight with this character (6)
I believe the answer is:
friday
'this character' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'i had to get into the fight' is the wordplay.
'i had' becomes 'i'd' (contraction).
'to get into' is an insertion indicator.
'the fight' becomes 'fray' (fray is a kind of fight).
'id' inserted inside 'fray' is 'FRIDAY'.
'with' acts as a link.
Can you help me to learn more?
(Other definitions for friday that I've seen before include "one of Chesterton's, so-called" , "If this day is the 13th, it's unlucky" , "twenty-four hours" , "Day named after a Norse goddess" , "The 13th is considered unlucky" .)