The most common and most likely answer to this crossword clue is the 11 letter word ENVIRONMENT
I've seen this crossword clue in The Times
E
N
V
I
R
O
N
M
E
N
T
More clues leading to the result ENVIRONMENT
Buddy explains!

The straight part
We know that "living conditions" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case living conditions = environment.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 ENVIRONMENT mean?
ENVIRONMENT noun- The surroundings of, and influences on, a particular item of interest.
- The natural world or ecosystem.
- All the elements that affect a system or its inputs and outputs.
- A particular political or social setting, arena or condition.
- The software and/or hardware existing on any particular computer system.
- The environment of a function at a point during the execution of a program is the set of identifiers in the function's scope and their bindings at that point.
- The set of variables and their values in a namespace that an operating system associates with a process.