Mount finale of festival, blocking version of my opus (7)
I believe the answer is:
olympus
'mount' is the definition.
(Olympus is an example)
'finale of festival blocking version of my opus' is the wordplay.
'finale of' says to take the final letters.
'blocking' indicates putting letters inside.
'version of' indicates an anagram.
The last letter of 'festival' is 'l'.
'my'+'opus'='myopus'
'myopus' is an anagram of 'oympus'.
'l' put within 'oympus' is 'OLYMPUS'.
(Other definitions for olympus that I've seen before include "Mount of the ancient Greek gods" , "Greece's highest mountain" , "Dwelling place of the Greek gods" , "Mountain home of the Greek gods" , "In Greek myth, Mount ....... was home of the Gods" .)