Shout of delight (6)
I believe the answer is:
yippee
'shout of delight' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for yippee that I've seen before include "Hurray" , "Shout of wild delight" , "expression of celebration" , "Cry of wild delight" , "Cry of excitement" .)