Darcy isn't likeable, initially -- Austen heroine's quandary (7)
I believe the answer is:
dilemma
'quandary' is the definition.
(synonyms)
'darcy isn't likeable initially austen heroine's' is the wordplay.
'initially' says to take the initial letters.
'austen heroine' becomes 'Emma' (heroine of Jane Austen's novel Emma).
The first letters of 'darcy isnt likeable' is 'dil'.
'dil'+'emma'='DILEMMA'
(Other definitions for dilemma that I've seen before include "Predicament" , "doubtful state" , "Difficult problem" , "I lammed away to find perplexing situation" , "Awkward situation" .)