Practicality; authenticity (7)
I believe the answer is:
realism
I believe this clue is a double definition.
'practicality' is the first definition.
(I know that realism is a type of practicality)
'authenticity' is the second definition.
(thesaurus)
(Other definitions for realism that I've seen before include "Rationality" , "Acceptance of the facts" , "Acceptance of life as it is" , "Artistic movement representing people and things as they actually are" , "Art genre that is true to life" .)