Rent an epitaph (3)
I believe the answer is:
rip
This clue is a double definition.
'rent' is the first definition.
(rent can mean a tear in something)
'an epitaph' is the second definition.
(rest in peace)
(Other definitions for rip that I've seen before include "Tearaway" , "Letters on a grave stone" , "often seen on tombstone" , "Letters often seen on gravestones" , "Letters often seen on gravestone" .)