The most common and most likely answer to this crossword clue is the 7 letter word REVISED
I've seen this crossword clue in Financial Times
R
E
V
I
S
E
D
More clues leading to the result REVISED
Buddy explains!

The straight part
We know that "Studied for exams/i/n a /new form" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case studied for exams/i/n a /new form = revised.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 REVISED mean?
REVISED verb- To look at again, to reflect on.
- To review, alter and amend, especially of written material.
- To look over again (something previously written or learned), especially in preparation for an examination.