The most common and most likely answer to this crossword clue is the 7 letter word REBUILT
I've seen this crossword clue in The Sunday Telegraph
R
E
B
U
I
L
T
Buddy explains!
The straight part
We know that "put in new form" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case put in new form = rebuilt.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 REBUILT mean?
REBUILT verb- To build again.
- Which has been rebuilt