Prudent, expedient (7)
I believe the answer is:
politic
I believe this clue is a double definition.
'prudent' is the first definition.
(I've seen this before)
'expedient' is the second definition.
(similar in meaning)
(Other definitions for politic that I've seen before include "Prudent, judicious" , "constitutional" , "Expedient" , "Advisable" , "Prudent and tactful" .)