Suddenly see shoot (4)
I believe the answer is:
twig
This clue is a double definition.
'suddenly see' is the first definition.
(I've seen this before)
'shoot' is the second definition.
(I've seen this before)
(Other definitions for twig that I've seen before include "Suddenly get" , "Small part of tree - suddenly understand" , "Thin branch" , "Slender woody shoot" , "very little from box, perhaps" .)