Large Miro sabotaged: complicated procedure (9)
I believe the answer is:
rigmarole
'complicated procedure' is the definition.
(I've seen this before)
'large miro sabotaged' is the wordplay.
'sabotaged' indicates an anagram.
'large'+'miro'='largemiro'
'largemiro' anagrammed gives 'RIGMAROLE'.
(Other definitions for rigmarole that I've seen before include "Lengthy and complicated procedure" , "Tedious procedure" , "Rambling account" , "fuss" , "boring series" .)