The most common and most likely answer to this crossword clue is the 6 letter word OXYGEN
O
X
Y
G
E
N
More clues leading to the result OXYGEN
- Plato finally co-ordinates knowledge — it's inspired
- O for a breather!
- Gas produced by cattle, extremely gusty, rising in their stomach?
- Second in command co-ordinates facts -- it's inspired
- O for breathable air!
- O‘Grady in orthodox drag to make endings funny
- O Little Town, sung to baby ox, ends in trouble
- Orchestra leader co-ordinates knowledge of gas
- Cunning but not to start with having information on gas
- Cattle bearing young discharged gas
Buddy explains!

The straight part
We know that "needed for living" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case needed for living = oxygen.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 OXYGEN mean?
OXYGEN noun- The chemical element (symbol O) with an atomic number of 8 and relative atomic mass of 15.9994. It is a colorless and odorless gas.
- Molecular oxygen (O2), a colorless, odorless gas at room temperature, also called dioxygen.
- A mixture of oxygen and other gases, administered to a patient to help them breathe.
- An atom of this element.