Opens up, in a way (6)
(Other definitions for blooms that I've seen before include "comes out" , "Develops" , "Flourishes" , "Flowers" .)
(Other definitions for blossoms that I've seen before include "Flourishes like flowers from fruit tree (8)" , "Puts forth flowers" , "Develops nicely like flowers" , "Blooms" , "Flowers, especially of fruit trees" .)