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' is an insertion indicator.
'love' becomes 'o' (love means zero in tennis).
'all' anagrammed gives 'lla'.
'lla' enclosing '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]" .)