Even an idiot has no love lost for it (3)
I believe the answer is:
nit
'even an idiot' is the definition.
'nit' can be an answer for 'idiot' (nit can mean a stupid person). I'm not certain of the 'even an' bit.
'no love lost for it' is the wordplay.
'love' becomes 'o' (love means zero in tennis).
'lost' suggests deleting specific letters.
'for' says to put letters next to each other.
'no' with 'o' removed is 'n'.
'n'+'it'='NIT'
'has' is the link.
Can you help me to learn more?
(Other definitions for nit that I've seen before include "no egghead?" , "Egg; fool" , "Egg of a louse (3)" , "Louse's egg - berk" , "Parasite's egg made of tin" .)