Love wicked character written by Aristophanes (5)
I believe the answer is:
omega
'character written by aristophanes' is the definition.
'omega' can be an answer for 'character' (letter of the Greek alphabet). I am not sure about the 'written by aristophanes' bit.
'love wicked' is the wordplay.
'love' becomes 'o' (love means zero in tennis).
'wicked' becomes 'mega' (I've seen this before).
'o'+'mega'='OMEGA'
Can you help me to learn more?
(Other definitions for omega that I've seen before include "letter from abroad" , "The last in a series of letters" , "completes a series" , "Final Greek letter" , "character from Athens" .)