The most common and most likely answer to this crossword clue is the 6 letter word LABLAB
L
A
B
L
A
B
More clues leading to the result LABLAB
Buddy explains!
The straight part
We know that "Tropical bean" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case tropical bean = lablab.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 LABLAB mean?
LABLAB noun- Any of the twining leguminous plants related to the bean, especially the hyacinth bean.