Individual absorbed by course, virtually complete (6)
I believe the answer is:
entire
'complete' is the definition.
('entire' can be a synonym of 'complete')
I can't explain the remainder of the clue.
(Other definitions for entire that I've seen before include "Full and complete" , "Whole and complete" , "Utter" , "With no part left out" , "Whole - undamaged" .)