The most common and most likely answer to this crossword clue is the 9 letter word NORMALISE
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More clues leading to the result NORMALISE
- Loose morals in Spain become commonplace
- Return to typical state, African one Norwegian seized
- Miss Desmond’s stays, we hear, given to regiment?
- 10 I'm going around New Orleans, to make it regular
- Make standard design of mails after adding one major tip at the end
- Unstable minerals containing oxygen return to standard state
- Unstable minerals, with oxygen, return to standard state
Buddy explains!

The straight part
We know that "return to standard state" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case return to standard state = normalise.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 NORMALISE mean?
NORMALISE verb- To make normal, to make standard.
- To format in a standardized manner, to make consistent.
- To reduce to variations by excluding irrelevant aspects.
- To return a set of points (switches) to the normal position.
- (of points) To return to the normal position from the reverse position.
- To subject to normalization; to eliminate redundancy in (a model for storing data).
- To divide a vector by its magnitude to produce a unit vector.