The most common and most likely answer to this crossword clue is the 7 letter word RUFFIAN
I've seen this crossword clue in The Daily Telegraph
R
U
F
F
I
A
N
More clues leading to the result RUFFIAN
- Hooligan managed to get round two-thirds of gallery in Florence
- Simple coat’s reversible hood
- Loudly coarse Scotsman is bully
- Reportedly violent fellow?
- Funfair disrupted by thug
- Went on securing gallery, ejecting one unknown thug
- Supporter embracing one sport after another, violent figure
- Rowdy rugby supporter going outside if promoted
- Cut-throat Muscovite, maybe, very loudly overpowering small son
- Hooligan sport enthusiast embracing Formula One
Buddy explains!

The straight part
We know that "Rowdy" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case rowdy = ruffian.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 RUFFIAN mean?
RUFFIAN noun- A scoundrel, rascal, or unprincipled, deceitful, brutal and unreliable person.
- A pimp; a pander.
- A lover; a paramour.
- To play the ruffian; to rage; to raise tumult.
- Brutal; cruel; savagely boisterous; murderous.