V-shaped stripe (7)
I believe the answer is:
chevron
'v-shaped stripe' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for chevron that I've seen before include "V-shaped sleeve badge" , "V-shaped line or stripe on uniform" , "V-shaped pattern or device" , "V-shaped design" , "V-shaped insignia" .)