The most common and most likely answer to this crossword clue is the 9 letter word POLITBURO
I've seen this crossword clue in Financial Times
P
O
L
I
T
B
U
R
O
More clues leading to the result POLITBURO
- Soviet leaders surprisingly built awfully poor houses
- Books and a sticker collected by mostly hard-up party organisers
- Hanger-on in largely civilised old Communist executive
- Drunk bowled in to serve old committee
- Nothing newly built taken in for committee
- Soviet leaders built poor revolution
- Mostly courteous Polish lifted old red cabinet
- Wretched poor built dachas for them?
- Communists managing to blur boundaries of ownership around Italy
- Committee in favour of keeping nothing built badly
Buddy explains!

The straight part
We know that "dachas for them" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case dachas for them = politburo.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 POLITBURO mean?
POLITBURO noun- The governing council and chief policymaking body of the Communist Party of the Soviet Union and other Marxist-Leninist political systems.
- (by extension, sometimes derogatory) A senior governing or policymaking body in a political or other organization, generally consisting of members who are either appointed by the party in control of the organization, or who attain membership through their personal political affiliations.