Applied, being sensible (9)
I believe the answer is:
practical
I believe this is a double definition.
'applied' is the first definition.
('practical' can be similar in meaning to 'applied')
'sensible' is the second definition.
(thesaurus)
'being' is the link.
(Other definitions for practical that I've seen before include "type of joker" , "Given to action rather than theory" , "Experiment" , "Functional, pragmatic" , "Sensible" .)