The most common and most likely answer to this crossword clue is the 8 letter word THEODORE
I've seen this crossword clue in The Guardian
T
H
E
O
D
O
R
E
More clues leading to the result THEODORE
- Man slammed the cottage‘s rear door
- Article Woodrow oddly ignored about Roosevelt
- Man reorganising the rodeo
- You may catch the smell of an American in a Roosevelt
- Big Ted with nothing to make in there
- Mr. Dreiser's odor picked up by you
- Beagle finally pursues the scent of a noted chipmunk
- Fuss about arresting that man — him?
Buddy explains!

The straight part
We know that "Man/cottage" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case man/cottage = theodore.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.