Jane, acting in her own persona (5)
I believe the answer is:
asher
'own persona' is the definition.
The definition suggests a singular noun which matches the answer.
'jane acting in her' is the wordplay.
I cannot quite see how this works, but
'acting' could be 'a' (abbreviation, eg in job titles) and 'a' is located in the answer.
'her' could be 'sher' and 'sher' is present in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for asher that I've seen before include "15 [JANE] the cake decorator" , "Hebrew patriarch" , "tribe" , "Jane --, actress and novelist" , "Jacob's son" .)