The most common and most likely answer to this crossword clue is the 4 letter word EDDO
I've seen this crossword clue in The Times
E
D
D
O
More clues leading to the result EDDO
- Edible plant partly wolfed down
- Tropical plant not fully bedded down
- Edible tuber fed to spoiled donkey
- Edible plant given in measured dose
- Earth not even, pulled up tuber
- The rejection of strange Eastern food — something starchy
- Earl turned over strange taro tuber
- Bring west strange eastern vegetable
- Some scoffed dodgy exotic vegetable
- Root found in sealed dock
Buddy explains!

The straight part
We know that "Tropical plant" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case tropical plant = eddo.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does EDDO mean?
EDDO noun- A plant (Colocasia esculenta, but often identified as Colocasia antiquorum, among numerous other synonyms), which is usually considered a variety of C. esculenta, with edible starchy tubers.
- The tubers of this plant.