Marked papers during meeting (7)
I believe the answer is:
evident
'marked' is the definition.
(I've seen this in another clue)
'papers during meeting' is the wordplay.
'papers' becomes 'ID' (identifying documents are one's 'papers').
'during' is an insertion indicator.
'meeting' becomes 'event' (meeting is a type of event).
'id' placed into 'event' is 'EVIDENT'.
(Other definitions for evident that I've seen before include "Plain to see" , "clearly visible" , "Easy to understand" , "Clearly apparent" , "Clearly discernible" .)