Rambunctious (5)
I believe the answer is:
rowdy
'rambunctious' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for rowdy that I've seen before include "Raucous" , "Noisy and disorderly" , "Noisy and unruly" , "Boisterous" , "yob" .)