Dance in Ireland is complicated (5)
I believe the answer is:
disco
'dance' is the definition.
(disco can mean a dance event)
'in ireland is complicated' is the wordplay.
'in' says the answer is hidden in the clue.
'DISCO' can be found hidden inside 'ireland is complicated'.
(Other definitions for disco that I've seen before include "Dancehall with recorded music, in short" , "Place to dance to recorded music, in short" , "Dance party" , "Type of music" , "Dancing to records" .)