Aroused by adult party in Ireland (5)
I believe the answer is:
awake
'aroused' is the definition.
(thesaurus)
'by adult party in ireland' is the wordplay.
'by' says to put letters next to each other.
'adult' becomes 'a'.
'party in ireland' becomes 'wake' (wakes after funerals are esp common in Ireland).
'a' next to 'wake' is 'AWAKE'.
(Other definitions for awake that I've seen before include "Rouse; vigilant" , "Unable to sleep" , "Become active again" , "Conscious, aware" , "Stop sleeping" .)