Records military music - Knut's missing the intro! (7)
I believe the answer is:
archive
'records' is the definition.
(an archive is a collection of records)
'military music knut's missing the intro' is the wordplay.
'military' becomes 'army' (the armed forces).
'music' becomes 'c'.
'knut's' becomes 'my' (where the crossword setter is 'Knut').
'missing' indicates named letters should be taken away.
'the intro' becomes 'hive' (I can't explain this - if you can you should believe this answer much more).
'army'+'c'='armyc'
'armyc' with 'my' taken away is 'arc'.
'arc'+'hive'='ARCHIVE'
Can you help me to learn more?
(Other definitions for archive that I've seen before include "store for the future" , "Records or historical papers of an institution" , "Collection of records or papers of an organisation" , "Depository for records and documents" , "Historical collection of documents" .)