The most common and most likely answer to this crossword clue is the 6 letter word REGIME
I've seen this crossword clue in The Daily Telegraph
R
E
G
I
M
E
More clues leading to the result REGIME
- Item on plate I note for diet?
- Something frosty about for example system of government
- Rule émigré out of order
- Government starts to regret electing good-for-nothing – time to remove leader
- Cook starts to explain echidna’s grim diet?
- Elite runners shamefully emigrate after missing opening parts of athletics tournament
- Command soldiers on base to capture Russian aeroplane from the south
- Rule for one that ruler’s upset about
- System of government, for example, brought in by Muslim ruler after revolution
- Government, for example, finding itself constricted by frost
Buddy explains!

The straight part
We know that "Government" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case government = regime.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 REGIME mean?
REGIME noun- Mode of rule or management.
- A form of government, or the government in power.
- A period of rule.
- A regulated system; a regimen.
- A division of a Mafia crime family, led by a caporegime.
- A set of characteristics.