Fealty; fidelity (7)
I believe the answer is:
loyalty
I believe this clue is a double definition.
'fealty' is the first definition.
(thesaurus)
'fidelity' is the second definition.
(I know that fidelity can be written as loyalty)
(Other definitions for loyalty that I've seen before include "Faithfulness" , "Firm allegiance" , "Firmness of allegiance" , "Strong allegiance" , "Dedication" .)