Might the manager be thus eyed? (4)
I believe the answer is:
boss
'eyed?' is the definition.
Both the answer and definition are adjectives. Maybe there's an association between them I don't understand?
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for boss that I've seen before include "One who manages" , "Bully" , "Gaffer, manager" , "One in charge; stud" , "Person managing" .)