The most common and most likely answer to this crossword clue is the 7 letter word RENEGUE
R
E
N
E
G
U
E
More clues leading to the result RENEGUE
- Fail to deliver green recycling by European Union retrospectively
- Go back on promise; EU manufacturing cut by 50% in recession
- Go back to EU, generally friendless in retreat
- Deny Frenchman visitor, no saint
- Rebel, missing a degree, must get posh instead or fail to fulfil promise
- The beginnings of renegotiation has EU backtrack – call off deal
- Unusual green with bend close to hole — and ditch
- Go back on serving Neera endlessly to half the guests
- Deny Green's faltering and beginning to use drug
- Go back on a promise to run away after a green transformation in the middle of a French street
Buddy explains!

The straight part
We know that "Go back on" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case go back on = renegue.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 RENEGUE mean?
RENEGUE verb- To break a promise or commitment; to go back on one's word.
- In a card game, to break one's commitment to follow suit when capable.
- To deny; to renounce