Shakespearean "you" (4)
I believe the answer is:
thou
'shakespearean you' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for thou that I've seen before include "Measure" , "You (many years ago)" , "Prominent pronoun of the King James Bible; the modern-day 'you'" , "Small measurement" , "You (arch.)" .)