Love huge for Greek character (5)
I believe the answer is:
omega
'for greek character' is the definition.
(letter from the Greek alphabet)
'love huge' is the wordplay.
'love' becomes 'o' (love means zero in tennis).
'huge' becomes 'mega' (mega can mean very large).
'o'+'mega'='OMEGA'
(Other definitions for omega that I've seen before include "Art of story-telling by body movement" , "letter to Greeks" , "Last letter of the Greek alphabet" , "Foreign character" , ""The Alpha and the ___"" .)