Looked fixedly (6)
I believe the answer is:
stared
'looked fixedly' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for stared that I've seen before include "Looked long and hard at" , "Gazed intently at" , "Look fixedly at" , "Looked with a fixed gaze" , "Gazed at in steady or prolonged way" .)