Endorse, advocate (9)
I believe the answer is:
recommend
I believe this is a double definition.
'endorse' is the first definition.
(thesaurus)
'advocate' is the second definition.
(I know that advocate can be written as recommend)
(Other definitions for recommend that I've seen before include "Advise (to do something)" , "Give advice" , "Approve" , "Advocate or advise as a course to take" , "Advise as suitable for acceptance" .)