The most common and most likely answer to this crossword clue is the 7 letter word SHINDIG
I've seen this crossword clue in Financial Times
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More clues leading to the result SHINDIG
- Part of leg found by excavation party
- Quiet at home - greatly appreciate a lively party
- Dish gin out — it’s a party!
- Do understand, a bit of leg goes to the head
- Jolly poke in the nether regions?
- Do quiet indignation, ignoring people
- Do wrong stealing horse by quarry
- Minding language, outsiders in stag party
- Party sealing lips, minding language
- Party language among squabbling fringes
Buddy explains!

The straight part
We know that "Jolly" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case jolly = shindig.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 SHINDIG mean?
SHINDIG noun- A noisy party or festivities.