The most common and most likely answer to this crossword clue is the 7 letter word AMAZING
I've seen this crossword clue in Independent
A
M
A
Z
I
N
G
More clues leading to the result AMAZING
- A life protecting mother, sublime
- Impressive magazine endlessly redistributed
- In the morning, tiny bit of amanatsu zest is fantastic
- Fantastic magazine distributed without energy
- Wonderful magazine, incompletely edited
- A master’s animation is stunning
- Mother possessed by a spirit that’s wicked
- Formidable internet giant with binary exchange — Google’s first
- Before PM starts, a vitality that’s remarkable
- Chinese dynasty hides first and final letters. Surprising?
Buddy explains!

The straight part
We know that "Fantastic" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case fantastic = amazing.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 AMAZING mean?
AMAZING verb- To fill with wonder and surprise; to astonish, astound, surprise or perplex.
- To undergo amazement; to be astounded.
- To stupefy; to knock unconscious.
- To bewilder; to stupefy; to bring into a maze.
- To terrify, to fill with panic.
- Causing wonder and amazement; very surprising.
- Possessing uniquely wonderful qualities.
- Very good.