Cry a bit more, love (3)
I believe the answer is:
moo
'cry' is the definition.
(I know that moo is a type of cry)
'a bit more love' is the wordplay.
'a bit more' becomes 'mo' (I've seen this in other clues. I am not sure about the 'bit' bit.).
'love' becomes 'o' (love means zero in tennis).
'mo'+'o'='MOO'
Can you help me to learn more?
(Other definitions for moo that I've seen before include "Cartoon sound of a cow" , "Cow's sound" , "unpopular woman" , "Guernsey noise?" , "Low (of cattle)" .)