Hippy gatherings — not very English, showing genital area! (5)
I believe the answer is:
loins
'genital area' is the definition.
(loins can mean one's genitals)
I cannot understand how the rest of the clue works.
(Other definitions for loins that I've seen before include "Gird one's - -" , "butcher's most tender cuts" , "part of body" , "Crotch" , "Lunchbox" .)