Troublesome weed with bright flowers (7)
I believe the answer is:
lantana
This clue might be a double definition.
'troublesome weed' is the first definition.
The answer and definition can be both plants as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'with bright flowers' is the second definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.
Can you help me to learn more?
(Another definition for lantana that I've seen is " Plant".)