The most common and most likely answer to this crossword clue is the 11 letter word SUBSISTENCE
S
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Buddy explains!
The straight part
We know that "Livelihood" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case livelihood = subsistence.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 SUBSISTENCE mean?
SUBSISTENCE noun- Real being; existence.
- The act of maintaining oneself at a minimum level.
- Inherency.
- Something (food, water, money, etc.) that is required to stay alive.
- Embodiment or personification or hypostasis of an underlying principle or quality.