American Beauty (4)
I believe the answer is:
rose
'american beauty' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for rose that I've seen before include "''That which we call a ..., by any other name would smell as sweet'' (Romeo and Juliet)" , "Pinkish wine" , "Pink, increased" , "Garden flower" , "Went up; plant" .)