The most common and most likely answer to this crossword clue is the 10 letter word PARLIAMENT
I've seen this crossword clue in The Times
P
A
R
L
I
A
M
E
N
T
More clues leading to the result PARLIAMENT
- Chambers: “a representative collection”
- Late MP ran frantically round independent part of government
- A plan with merit? Not usually in this chamber
- See 1ac.
- Standard moan about Independent at Westminster?
- Roughly laminate covers of prewar Chambers?
- Diet has the expected result, one overcome by expression of sorrow
- Men partial to get drunk in this house
- Seen in the Guardian, an Irish boy’s diet?
- 14 to bring up receiving letters from the right
Buddy explains!

The straight part
We know that "Chambers/a representative collection" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case chambers/a representative collection = parliament.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 PARLIAMENT mean?
PARLIAMENT noun- A formal council summoned (especially by a monarch) to discuss important issues.
- In many countries, the legislative branch of government, a deliberative assembly or set of assemblies whose elected or appointed members meet to debate the major political issues of the day, make, amend, and repeal laws, authorize the executive branch of government to spend money, and in some cases exercise judicial powers; a legislature.
- A particular assembly of the members of such a legislature, as convened for a specific purpose or period of time (commonly designated with an ordinal number – for example, first parliament or 12th parliament – or a descriptive adjective – for example, Long Parliament, Short Parliament and Rump Parliament).
- A gathering of birds, especially rooks or owls.
- Parliament cake, a type of gingerbread.