What does the cryptic crossword clue "Gas — more than enough but not all of it (6)" mean?

The definition is "Gas". The wordplay uses a hidden word. Hidden in "gas — morE THAN Enough but not all of it" The answer is ETHANE.

Gas — more than enough but not all of it (6)

Guardian Cryptic #28960 | 21 Down | 2023-01-06 flower