Small blue flower (6-2-3)
I believe the answer is:
forget-me-not
'small blue flower' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for forget-me-not that I've seen before include "Myosotis" , "Plant of the borage family, usually with bright blue flowers" , "Bright blue flower" , "Small blue flower" , "Wild flower" .)