Klutz's cry (4)
I believe the answer is:
oops
'klutz's cry' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for oops that I've seen before include "I've messed up" , "Clumsy me!" , "Exclamation on making minor error" , "Oh dear, that was careless!" , "Blunder explanation" .)