She's all confused about love (4)
I believe the answer is:
lola
'she's' is the definition.
'all confused about love' is the wordplay.
'confused' indicates an anagram.
'about' indicates putting letters inside.
'love' becomes 'o' (In tennis, 'love' means 'zero').
'all' anagrammed gives 'lla'.
'lla' placed around 'o' is 'LOLA'.
(Other definitions for lola that I've seen before include "Whatever -- wants (song); -- Montez, mistress of Ludwig I" , "song by 4 [THE KINKS]" .)