Word of woe (4)
I believe the answer is:
alas
'word of woe' 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 "woebegone expression" , "Sad expression" , "Archaic exclamation of sorrow or regret" , "Sadly, unfortunately" , "By bad luck" .)