The most common and most likely answer to this crossword clue is the 7 letter word DISSENT
I've seen this crossword clue in The Guardian
D
I
S
S
E
N
T
More clues leading to the result DISSENT
- Police officers transferred for challenge to orthodoxy
- Daughter is ecstatic making protest
- Protest as daughter gets posted
- Detective inspectors dispatched to protest
- Girl’s perfume reportedly causing a difference of opinion
- Protest from Democrat is posted
- Admit sister regularly meets conservationists making protest
- Don’t agree damage is small to interior
- Policemen addressed protest
- Protest from daughter is broadcast
Buddy explains!

The straight part
We know that "protest" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case protest = dissent.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 DISSENT mean?
DISSENT noun- Disagreement with the ideas, doctrines, decrees, etc. of a political party, government or religion.
- An act of disagreeing with, or deviating from, the views and opinions of those holding authority.
- (Anglo-American common law) A separate opinion filed in a case by judges who disagree with the outcome of the majority of the court in that case
- A violation that arises when disagreement with an official call is expressed in an inappropriate manner such as foul language, rude gestures, of failure to comply.
- To disagree; to withhold assent. Construed with from (or, formerly, to).
- To differ from, especially in opinion, beliefs, etc.
- To be different; to have contrary characteristics.