Cryptic crossword clue
Displaying this makes a van nationalistic, it’s plain 7

The most common and most likely answer to this crossword clue is the 7 letter word SAVANNA

I've seen this crossword clue in The Daily Telegraph
S
A
V
A
N
N
A


Buddy explains!

The straight part
We know that "it’s plain" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case it’s plain = savanna.
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 SAVANNA mean?

SAVANNA noun
  1. A tropical grassland with scattered trees

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