Baron avoids displaying deference that's due (5)
I believe the answer is:
owing
'due' is the definition.
(similar in meaning)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for owing that I've seen before include "Unsettled; on account" , "Undischarged" , "Still outstanding" , "Unpaid" , "This debt has yet to be paid" .)