The name for gas (7)
I believe the answer is:
methane
This clue might be a double definition.
'the name' is the first definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.
'gas' is the second definition.
(I've seen this before)
'for' is the link.
Can you help me to learn more?
(Other definitions for methane that I've seen before include "Main component of natural gas" , "compound" , "Marsh-gas" , "Firedamp" , "Combustible atmosphere" .)