Ibsen heroine an overthinker, it’s said (4)
I believe the answer is:
nora
'ibsen heroine' is the definition.
(I've seen this in another clue)
'an overthinker it's said' is the wordplay.
I cannot really understand how this works, but
'an' could be 'a' and 'a' is located in the answer.
The remaining letters 'nor' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for nora that I've seen before include "Girl's name" , "Woman" , "-- Batty (Last of the Summer Wine)" .)