The most common and most likely answer to this crossword clue is the 7 letter word RESHAPE
I've seen this crossword clue in The Daily Telegraph
R
E
S
H
A
P
E
More clues leading to the result RESHAPE
- Pipe down in harvester reduced mould
- Change concerning quiet primate
- Once again mould turn of phrase, English
- Change a sphere into a cube?
- Alter in the case of quiet mimic
- Some fresh aperitifs in fashion again?
- A sphere recreated form again
- Change the form of a sphere!
- Alter phaser broken by Enterprise’s leader
Buddy explains!

The straight part
We know that "form again" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case form again = reshape.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 RESHAPE mean?
RESHAPE verb- To make into a different shape
- To reorganize