The most common and most likely answer to this crossword clue is the 5 letter word GASES
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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.
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What does GASES mean?
GASES noun- Matter in a state intermediate between liquid and plasma that can be contained only if it is fully surrounded by a solid (or in a bubble of liquid) (or held together by gravitational pull); it can condense into a liquid, or can (rarely) become a solid directly.
- A chemical element or compound in such a state.
- A flammable gaseous hydrocarbon or hydrocarbon mixture (typically predominantly methane) used as a fuel, e.g. for cooking, heating, electricity generation or as a fuel in internal combustion engines in vehicles.
- A hob on a gas cooker.
- Methane or other waste gases trapped in one's belly as a result of the digestive process.
- A humorous or entertaining event or person.
- Frothy talk; chatter.
- A fastball.
- Arterial or venous blood gas.
- Marijuana, typically of high quality.
- To kill with poisonous gas.
- To talk in a boastful or vapid way; chatter.
- To impose upon by talking boastfully.
- To emit gas.
- To impregnate with gas.
- To singe, as in a gas flame, so as to remove loose fibers.
- Gasoline; a derivative of petroleum used as fuel.
- Gas pedal.
- To give a vehicle more fuel in order to accelerate it.
- To fill (a vehicle's fuel tank) with fuel.