Oak of the future (5)
I believe the answer is:
acorn
(Other definitions for acorn that I've seen before include "oak's fruit" , "From which a "tall oak" may grow" , "form of seeding" , "Fruit-seed of the oak" , "Tree seed" .)
I believe the answer is:
acorn
(Other definitions for acorn that I've seen before include "oak's fruit" , "From which a "tall oak" may grow" , "form of seeding" , "Fruit-seed of the oak" , "Tree seed" .)