Rubbernecked (6)
I believe the answer is:
stared
'rubbernecked' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for stared that I've seen before include "Gazed at in steady or prolonged way" , "Gazed intently at" , "Looked at long and fixedly" , "Treads (anag)" , "Subjected to prolonged gaze" .)