The most common and most likely answer to this crossword clue is the 10 letter word CONFORMING
I've seen this crossword clue in The Guardian
C
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Buddy explains!

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 CONFORMING mean?
CONFORMING verb- (of persons, often followed by to) To act in accordance with expectations; to behave in the manner of others, especially as a result of social pressure.
- (of things, situations, etc.) To be in accordance with a set of specifications or regulations, or with a policy or guideline.
- To make similar in form or nature; to make suitable for a purpose; to adapt.
- Exhibiting conformity.