Goer is excited by wild parties (6)
I believe the answer is:
orgies
'wild parties' is the definition.
(I've seen this before)
'goer is excited' is the wordplay.
'excited' indicates an anagram.
'goer'+'is'='goeris'
'goeris' anagrammed gives 'ORGIES'.
'by' is the link.
(Other definitions for orgies that I've seen before include "Acts of immoderate indulgence" , "Drunken revels" , "Wild parties with excessive drinking and sexual activity" , "Wild licentious parties" .)