Split chord in botched opera gig (8)
I believe the answer is:
arpeggio
'split chord' is the definition.
(I've seen this before)
'botched opera gig' is the wordplay.
'botched' indicates an anagram.
'opera'+'gig'='operagig'
'operagig' with letters rearranged gives 'ARPEGGIO'.
'in' is the link.
(Other definitions for arpeggio that I've seen before include "A broken chord" , "Piano exercise" , "Notes played in quick succession" , "Split chord" , "Pianist's exercise" .)