The most common and most likely answer to this crossword clue is the 7 letter word ASEPSIS
I've seen this crossword clue in Financial Times
A
S
E
P
S
I
S
More clues leading to the result ASEPSIS
- Purity of peas cultivated by relative
- After a month, sibling shows freedom from pathogens
- Being germ-free, is almost passed for work
- Pies cooked on board a ship where no germs are present
- Sterility of clot injected with unlimited enzyme
- A special fizzy drink’s heading off sterility
- Australian snake exists in poison-free state
- One passes away in a sterile environment
Buddy explains!

The straight part
We know that "Sterility" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case sterility = asepsis.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 ASEPSIS mean?
ASEPSIS noun- The state of being free from sepsis.
- The process of removing pathogenic organisms or protecting against such organisms.