The most common and most likely answer to this crossword clue is the 7 letter word RIOTOUS
I've seen this crossword clue in The Times
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More clues leading to the result RIOTOUS
- Very funny route north-west from Brazil?
- Wild Brazilian city, as far as we are concerned
- Lawless venue for Olympics, in our opinion
- City with favelas as far as we're concerned ungovernable?
- Disorderly itinerary of NY-bound Brazilian?
- Unruly port, in our view
- Roistering in port, dishevelled, led away
- Reckless Brazilian’s route north?
- Very lively South American city, in our opinion
- Rampant suitor upset catching zip
Buddy explains!

The straight part
We know that "Very funny" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case very funny = riotous.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 RIOTOUS mean?
RIOTOUS adjective- Having the characteristics of a riot
- Causing, inciting or taking part in a riot
- Unrestrained and boisterous; degenerate or dissolute