Getting ready for an opera trip, perhaps (11)
I believe the answer is:
preparation
'getting ready' is the definition.
(I've seen this before)
'an opera trip perhaps' is the wordplay.
'perhaps' is an anagram indicator.
'an'+'opera'+'trip'='anoperatrip'
'anoperatrip' with letters rearranged gives 'PREPARATION'.
'for' acts as a link.
(Other definitions for preparation that I've seen before include "Planning" , "getting ready" , "Homework" , "Iron parapet (anag.)" , "readiness" .)