The most common and most likely answer to this crossword clue is the 5 plus 4 letter word CARPE DIEM
I've seen this crossword clue in The Guardian
C
A
R
P
E
D
I
E
M
More clues leading to the result CARPE DIEM
- Short drama piece broadcast live for now
- Flying ace primed to live for the moment
- To grumble I deem silly – live for the moment
- Found fault with Viz mag’s Top Tip about now
- Relish the moment I’m deep in trouble chasing vehicle
- Seize the day pass camper’s out to snaffle
- Gather ye rosebuds for another mad recipe
- Fish go in mid-December, so strike now!
- Make the most of the time you have and throw cream pie over old copper
- Little money invested in Medicare, unfortunately, so live for today!
Buddy explains!
The straight part
We know that "It’s Now Or Never" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case it’s now or never = carpe diem.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.