She's usually after Eliza (4)
I believe the answer is:
beth
'she's' is the definition.
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for beth that I've seen before include "Little Women sister" , "Meg, Jo, - - and Amy" , "Second Hebrew letter" , "Queen, either of two" , "character in Israel" .)