Friends' pronoun
I believe the answer is:
thee
'friends' pronoun' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for thee that I've seen before include "Poetically you" , "You (arch.)" , "Archaic form of 'you'" , "You in the olden days" , "Quaker 'you'" .)