Message on tomb that brings a tear (3)
I believe the answer is:
rip
I believe this clue is a double definition.
'message on tomb' is the first definition.
(rest in peace)
'a tear' is the second definition.
('rip' can be a synonym of 'tear')
'that brings' is the link.
(Other definitions for rip that I've seen before include "Letters usually seen on gravestone" , "parting message" , "The familiar Mr Van Winkle" , "Letters usually carved on gravestone" , "Letters often seen on gravestone" .)