Mutated gene shortens berry in some plants (8)
I believe the answer is:
greenery
'berry in some plants' is the definition.
The definition and answer can be both plants as well as being singular nouns.
Maybe you can see a link between them that I can't see?
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for greenery that I've seen before include "colourful stuff?" , "Decorative boughs" , "Leaves etc" , "Trees" , "Leafy vegetation" .)