The most common and most likely answer to this crossword clue is the 10 letter word TRANSITION
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Buddy explains!

The straight part
We know that "Change" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case change = transition.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 TRANSITION mean?
TRANSITION noun- The process of change from one form, state, style or place to another.
- A word or phrase connecting one part of a discourse to another.
- A brief modulation; a passage connecting two themes.
- A change of key.
- A point mutation in which one base is replaced by another of the same class (purine or pyrimidine); compare transversion.
- A change from defense to attack, or attack to defense.
- The onset of the final stage of childbirth.
- Professional special education assistance for children or adults in the process of leaving one educational environment or support program for another to relatively more independent living.
- A change between forward and backward motion without stopping.
- The process or act of changing from one gender role to another, or of bringing one's outward appearance in line with one's internal gender identity.
- To make a transition.
- To bring through a transition; to change.
- To change from one gender role to another, or bring one's outward appearance in line with one's internal gender identity.