Dedicate (6)
I believe the answer is:
devote
'dedicate' is the definition.
(I know that dedicate can be written as devote)
This is the entire clue.
(Other definitions for devote that I've seen before include "Use or dedicate for particular purpose" , "Resolutely apply" , "Dedicate totally" , "Give (time or resources to an activity)" , "Dedicate (oneself)" .)