Approach abruptly (6)
I believe the answer is:
accost
'approach abruptly' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for accost that I've seen before include "Tackle" , "Approach boldly or insolently" , "approach with menaces" , "Come boldly up to" , "Approach and threaten (someone)" .)