Frat party feature (3)
I believe the answer is:
keg
'frat party feature' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for keg that I've seen before include "Small beer cask" , "Small cask or barrel" , "What's found at King's Head" , "Sort of beer" , "Barrel as for beer" .)