The most common and most likely answer to this crossword clue is the 4 letter word BAND
I've seen this crossword clue in Independent
B
A
N
D
More clues leading to the result BAND
- Sound made by outlawed group of musicians
- Group prohibited, we hear?
- Obtained oddly deficient belt
- Outlaw finally joined gang
- Party‘s broadcast censored
- Group outlawed on the radio
- Group not allowed to broadcast
- Not allowed to listen to musicians
- National leader introduced to Rotten’s group
- Also after leader of backing group
Buddy explains!

The straight part
We know that "belt" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case belt = band.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 BAND mean?
BAND noun- A strip of material used for strengthening or coupling.
- A long strip of material, color, etc, that is different from the surrounding area.
- A strip of decoration.
- That which serves as the means of union or connection between persons; a tie.
- A linen collar or ruff worn in the 16th and 17th centuries.
- (in the plural) Two strips of linen hanging from the neck in front as part of a clerical, legal, or academic dress.
- A part of the electromagnetic spectrum.
- A group of energy levels in a solid state material.
- A bond.
- Pledge; security.
- A ring, such as a wedding ring (wedding band), or a ring put on a bird's leg to identify it.
- Any distinguishing line formed by chromatography, electrophoresis etc
- Short for band cell.
- (hiphop, often in the plural) A wad of money totaling $1K, held together by a band; (by extension) money
- To fasten with a band.
- To fasten an identifying band around the leg of (a bird).
- A group of musicians who perform together as an ensemble, usually for a professional recording artist.
- A type of orchestra originally playing janissary music.
- A marching band.
- A group of people loosely united for a common purpose (a band of thieves).
- A small group of people living in a simple society, contrasted with tribes, chiefdoms, and states.
- A group of aboriginals that has official recognition as an organized unit by the federal government of Canada.
- To group together for a common purpose; to confederate.
- To group (students) together by perceived ability; to stream.
- To tie; to confine by any ligature.
- To cohere or stick together in a mass.
- To be restrained from motion, or from customary or natural action, as by friction.
- To exert a binding or restraining influence.
- To tie or fasten tightly together, with a cord, band, ligature, chain, etc.
- To confine, restrain, or hold by physical force or influence of any kind.
- To couple.
- To oblige, restrain, or hold, by authority, law, duty, promise, vow, affection, or other social tie.
- To put (a person) under definite legal obligations, especially, under the obligation of a bond or covenant.
- To place under legal obligation to serve.
- To protect or strengthen by applying a band or binding, as the edge of a carpet or garment.
- To make fast (a thing) about or upon something, as by tying; to encircle with something.
- To cover, as with a bandage.
- To prevent or restrain from customary or natural action, as by producing constipation.
- To put together in a cover, as of books.
- To make two or more elements stick together.
- To associate an identifier with a value; to associate a variable name, method name, etc. with the content of a storage location.
- To complain; to whine about something.