Ardent, devout (7)
I believe the answer is:
devoted
I believe this is a double definition.
'ardent' is the first definition.
(I've seen this in another clue)
'devout' is the second definition.
(thesaurus)
(Other definitions for devoted that I've seen before include "Faithful" , "Dedicated or wholly given up to" , "Strongly attached (to)" , "Loving and loyal" .)