She performs doggedly in 'Peter Pan' (4)
I believe the answer is:
nana
'she' is the definition.
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for nana that I've seen before include "Idiot" , "Zola's heroine" , "Grandma" , "Darling dog" , "Zola tale of a courtesan" .)