A national study of English for example (7)
I believe the answer is:
subject
This clue is a triple definition!
'a national' is the first definition.
(I know that national can be written as subject)
'study' is the second definition.
(synonyms)
'of' is a link.
'english for example' is the third definition.
(I know that English is a type of arts)
(Other definitions for subject that I've seen before include "Subordinate - part of sentence" , "Theme - one under rule" , "guinea pig" , "Theme (of a fugue)" , "Division of curriculum" .)