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 anagramming the letters.
'about' is an insertion indicator.
'love' becomes 'o' (love means zero in tennis).
'all' anagrammed gives 'lla'.
'lla' going 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]" .)