Love extremely good conclusion to series (5)
I believe the answer is:
omega
'conclusion to series' is the definition.
I can't judge whether this definition defines the answer.
'love extremely good' is the wordplay.
'love' becomes 'o' (love means zero in tennis).
'extremely good' 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 "Last thing" , "Greek long 'o'" , "symbol of resistance?" , "The last in a series of letters" , "character from Athens" .)