The most common and most likely answer to this crossword clue is the 6 letter word LIVING
I've seen this crossword clue in Financial Times
L
I
V
I
N
G
Buddy explains!
The straight part
We know that "Quick" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case quick = living.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 LIVING mean?
LIVING verb- To be alive; to have life.
- To have permanent residence somewhere, to inhabit, to reside.
- To survive; to persevere; to continue.
- To cope.
- To pass life in a specified manner.
- To spend, as one's life; to pass; to maintain; to continue in, constantly or habitually.
- To act habitually in conformity with; to practice; to exemplify in one's way of life.
- To outlast danger; to float (said of a ship, boat, etc).
- (followed by "on" or "upon") To maintain or support one's existence; to provide for oneself; to feed; to subsist.
- To make the most of life; to experience a full, rich life.
- The state of being alive.
- (plural, with "the", a demonstrative, or a possessive) Those who are alive.
- Financial means; a means of maintaining life; livelihood
- A style of life.
- (canon law) A position in a church (usually the Church of England) that has attached to it a source of income; an ecclesiastical benefice.
- Having life.
- In use or existing.
- Of everyday life.
- True to life.
- Used as an intensifier.