Records? Yes of course (8)
I believe the answer is:
logbooks
'records?' is the definition.
(logbook is a kind of record)
'yes of course' is the wordplay.
I cannot quite understand how this works, but
'yes' could be 'ok' (both are affirmative answers) and 'ok' is present in the answer.
'of' could be 'o' and 'o' is located in the answer.
'course' could be 's' and 's' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Another definition for logbooks that I've seen is " Record volumes".)