The most common and most likely answer to this crossword clue is the 7 letter word BELLOWS
I've seen this crossword clue in The Guardian
B
E
L
L
O
W
S
More clues leading to the result BELLOWS
Buddy explains!

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 BELLOWS mean?
BELLOWS noun- A device for delivering pressurized air in a controlled quantity to a controlled location. At its most simple terms a bellows is a container which is deformable in such a way as to alter its volume which has an outlet or outlets where one wishes to blow air.
- Any flexible container or enclosure, as one used to cover a moving joint.
- The lungs.
- Flexible, light-tight enclosures connecting the lensboard and the camera back.
- That which fans the fire of hatred, jealousy, etc.
- To operate a bellows; to direct air at (something) using a bellows.
- To expand and contract like a bellows.
- To fold up like a bellows; to accordion.
- The deep roar of a large animal, or any similar loud noise.
- To make a loud, deep, hollow noise like the roar of an angry bull.
- To shout in a deep voice.