Frat dude (3)
I believe the answer is:
bro
'frat dude' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for bro that I've seen before include "somewhere one feels close to" , "who may have a 28 [SIS]?" , "Word used for male relative" , "US form of address" , "Sis's sibling?" .)