Involved; curious (10)
I believe the answer is:
interested
I believe this clue is a double definition.
'involved' is the first definition.
(thesaurus)
'curious' is the second definition.
(similar in meaning)
(Other definitions for interested that I've seen before include "Wanting to know" , "Not impartial" , "Showing curiosity" , "Partisan" , "prejudiced" .)