The most common and most likely answer to this crossword clue is the 5 plus 3 plus 4 letter word RAISE THE ROOF
I've seen this crossword clue in The Times
R
A
I
S
E
T
H
E
R
O
O
F
More clues leading to the result RAISE THE ROOF
- Wildly cheer protagonist in satire of novel
- Hear Rite of Spring, opus primarily composed to make a lot of noise
- Fear hooter is ill-fitted to make lots of noise
- How to install loft? Bring the house down, paradoxically
- Make a lot of noise, and work on loft extension?
- Storm? Provide protection from it, perhaps
- Create a commotion to make building taller
- Increase attic space and make a lot of noise
- Jack could be required to make merry!
- Makes it hot — easier for one to create a ruckus
Buddy explains!
The straight part
We know that "Wildly cheer" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case wildly cheer = raise the roof.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.