Still hate you -- just a little bit head over heels (3)
I believe the answer is:
one
I believe this clue is a sextuple definition!!!
'still hate you' is the first definition.
'one' can be an answer for 'you' (I've seen this before). I'm not sure about the 'still hate' bit.
'just' is the second definition.
(thesaurus)
'a' is the third definition.
'little' is the fourth definition.
The definition and answer can be both quantities as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'bit' is the fifth definition.
The definition and answer can be both quantities as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'head over heels' is the sixth definition.
'one' can be an answer for 'head' (thesaurus). I am not sure about the 'over heels' bit.
Can you help me to learn more?
(Other definitions for one that I've seen before include "Sole; number" , "A certain; single person" , "I can mean this" , "Single, sole" , "Leading cardinal" .)