The most common and most likely answer to this crossword clue is the 8 letter word EMERGENT
I've seen this crossword clue in The Guardian
E
M
E
R
G
E
N
T
More clues leading to the result EMERGENT
- Newly independent guy has hesitation about me at first
- Upset about yours truly, guy coming out
- Pure and simple, back to front man is burgeoning
- Budding setter’s back, with hesitation, information and time
- Budding servicemen put up with toff
- Greet men excited to be coming out
- Fledgling on me repelled man
- Fantastic Mere Man is coming!
- Coming out, meet in hospital department
- Greet men in battle coming to the front?
Buddy explains!

The straight part
We know that "coming" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case coming = emergent.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 EMERGENT mean?
EMERGENT noun- A plant whose root system grows underwater, but whose shoot, leaves and flowers grow up and above the water.
- Emerging; coming into view or into existence; nascent; new.
- Arising unexpectedly, especially if also calling for immediate reaction; constituting an emergency.
- Taller than the surrounding vegetation.
- (of a water-dwelling plant) Having leaves and flowers above the water.
- Having gameplay that arises from its mechanics, rather than a linear storyline.
- Having properties as a whole that are more complex than the properties contributed by each of the components individually.