In a model landscape, a low part (4)
I believe the answer is:
Here is my best explanation:
'low part' is the definition.
The answer and definition can be both natural objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'in a model landscape a' is the wordplay.
'in' indicates the answer is hidden within the clue.
'DELL' is hidden in the letters of 'model landscape a'.
Can you help me to learn more?