Came into view (6)
I believe the answer is:
loomed
'came into view' is the definition.
('loom' can be a synonym of 'come into view')
This is all the clue.
(Other definitions for loomed that I've seen before include "Soared threateningly ahead" , "Was imminent as something dark and menacing" , "Appeared threateningly ahead" , "Came into view indistinctly, often threateningly" , "Rose up menacingly ahead" .)