Ten Benjamins (4)
I believe the answer is:
thou
'ten benjamins' 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 "Refers to the person addressed (archaic)" , "Old English pronoun" , "Subject" , "Biblical 'you'" , "Prominent pronoun of the King James Bible; the modern-day 'you'" .)