Obsessed (6)
I believe the answer is:
hooked
'obsessed' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for hooked that I've seen before include "being on line?" , "Unable to come off drugs" , "Addicted; (fish) caught" , "Enthralled" , "Curved down, like an eagle's beak" .)