Shakespearean heroine I think will get information (6)
I believe the answer is:
imogen
'shakespearean heroine' is the definition.
(I've seen this before)
'i think will get information' is the wordplay.
'i think' becomes 'imo' (abbreviation for 'in my opinion').
'will get' is a charade indicator (letters next to each other).
'information' becomes 'gen' (gen is a kind of information).
'imo'+'gen'='IMOGEN'
(Other definitions for imogen that I've seen before include "girl" , "Shakespearean heroine" , "child of a king" , "Princess in "Cymbeline"" , "identity of Cymbeline's daughter" .)