The most common and most likely answer to this crossword clue is the 13 letter word SCANDALMONGER
I've seen this crossword clue in The Times
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More clues leading to the result SCANDALMONGER
- One to relish canard spread?
- Examine attorney more protractedly about male spreader of gossip
- He spreads dirt around in foreign land — no germs
- Random glances around from muck spreader
- Gossip left doctor in peril after examination
- Study Dutch welfare worker hiring German gossip
- Gossip once grand slam broadcast
- Man troubled with nag, scolder, gossip
- Gossip involving Cameron lands government in it
- Muck-raker to run down mother entwined with one having desire?
Buddy explains!

The straight part
We know that "this guy" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case this guy = scandalmonger.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 SCANDALMONGER mean?
SCANDALMONGER noun- A person who trades in gossip; one who collects and disseminates rumors.