The most common and most likely answer to this crossword clue is the 9 letter word RENASCENT
I've seen this crossword clue in The Guardian
R
E
N
A
S
C
E
N
T
More clues leading to the result RENASCENT
- Around noon, a son late rising again
- More sensible about coin coming back into currency
- Concerned with new climb and gaining fresh energy
- Born again Christian finally given rise after religious teaching
- Making a comeback near broken-down trail
- Coming back in baroque entrances
- Becoming active again, being more rational about money
- Becoming active again, finally striker offside: Spain moving up
- Becoming vigorous again, disregarding odds, urge on climb?
- Childrenon the uphill path, getting new vitality
Buddy explains!

The straight part
We know that "Coming back" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case coming back = renascent.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 RENASCENT mean?
RENASCENT adjective- Experiencing renewed vigor; being reborn.