The most common and most likely answer to this crossword clue is the 7 letter word DECIDED
I've seen this crossword clue in The Daily Telegraph
D
E
C
I
D
E
D
More clues leading to the result DECIDED
- Firm of detectives in action
- Determined detectives engaged in exploit
- Chose to be made redundant as detective?
- Settled without police action
- Determined detectives in action
- Settled legal document about police force
- Determined to have detectives involved in act
- ‘Firm‘ detectives caught in act
- Resolute detectives break up action one way or the other
- Resolute detectives in action
Buddy explains!

The straight part
We know that "Resolute" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case resolute = decided.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 DECIDED mean?
DECIDED verb- To resolve (a contest, problem, dispute, etc.); to choose, determine, or settle
- To make a judgment, especially after deliberation
- To cause someone to come to a decision
- To cut off; to separate
- Determined; resolute
- Clear; unmistakable