Anonymous Jane or John (3)
I believe the answer is:
doe
I believe this clue is a double definition.
'anonymous jane' is the first definition.
(I've seen this in another clue)
'john' is the second definition.
(I've seen this in another clue)
(Other definitions for doe that I've seen before include "She's a deer" , "Mummy rabbit" , "A female deet" , "Female creature" , "female in the field?" .)