Conscientious, dutiful (8)
I believe the answer is:
diligent
I believe this is a double definition.
'conscientious' is the first definition.
(I've seen this before)
'dutiful' is the second definition.
(thesaurus)
(Other definitions for diligent that I've seen before include "I tingled, being hard-working and conscientious" , "Industrious" , "Conscientious and careful" , "Painstaking - I tingled (anag)" , "Attentive and busy" .)