Word repeated before "hurray!" (3)
I believe the answer is:
hip
'word repeated before hurray' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for hip that I've seen before include "Fruit of the dog-rose" , "Joint; rose fruit" , "Side of body - very sophisticated" , "Slangily trendy part of body" , "Slangily stylish like rose fruit" .)