The most common and most likely answer to this crossword clue is the 7 letter word READOPT
R
E
A
D
O
P
T
More clues leading to the result READOPT
Buddy explains!
The straight part
We know that "follow principles again" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case follow principles again = readopt.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 READOPT mean?
READOPT verb- Adopt again