The most common and most likely answer to this crossword clue is the 4 plus 3 letter word IRON OUT
I
R
O
N
O
U
T
More clues leading to the result IRON OUT
- Few taking this could make weight correct
- Man in promise to pay on time shows resolve
- One might ask caddie to get this put right
- Clear up club completely
- Firm on strike in Settle
- Decrease — one’s differences, say?
- Clear up press in print
- About to go to press, apparently showing resolve
- Solve one number in retreat
- Resolve shown by one working aboard flight
Buddy explains!

The straight part
We know that "Resolve" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case resolve = iron out.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.