The most common and most likely answer to this crossword clue is the 14 letter word TROUBLESHOOTER
I've seen this crossword clue in The Sunday Telegraph
T
R
O
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B
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S
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O
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R
More clues leading to the result TROUBLESHOOTER
- Repairman beginning to tackle siren, accepting foreign cash
- Business adviser gives one a nosebleed, perhaps?
- Repairman gets up one’s nose
- Snitch primarily annoys Mr Fixit
- Solver scrapes nose
- Person seeking conflict resolution causes one to reach for hanky?
- Fixer to others worried when importing foreign currency
- Meandering hotel tour bores Mr Fixit?
- Repair man makes brother lose out
- Fixer who’s corrupt to others protecting currency?
Buddy explains!
The straight part
We know that "Person seeking conflict resolution" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case person seeking conflict resolution = troubleshooter.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.