Griever's exclamation (4)
I believe the answer is:
alas
'griever's exclamation' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for alas that I've seen before include "Archaic exclamation of sorrow or regret" , "-- and alack!" , "Expression of grief or misfortune" , "More's the pity" , "By bad luck" .)