The most common and most likely answer to this crossword clue is the 6 letter word STEPPE
I've seen this crossword clue in The Daily Telegraph
S
T
E
P
P
E
More clues leading to the result STEPPE
- Sound process identifying Russian plain
- Plain small space with potential energy
- Bit of a walk? Exercise, that’s plain
- Plain small place to drive around very quietly
- Plain course of action read out
- Land in Siberia, part of journey being discussed
- Plain stage exercises
- Rung on the phone, that’s plain
- Badly set university course, that’s plain
- Plain, small, very quiet place to drive herds
Buddy explains!
The straight part
We know that "plain territory" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case plain territory = steppe.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 STEPPE mean?
STEPPE noun- The grasslands of Eastern Europe and Asia. Similar to (North American) prairie and (African) savanna.
- A vast cold, dry grass-plain.