The most common and most likely answer to this crossword clue is the 6 letter word YELLOW
I've seen this crossword clue in Financial Times
Y
E
L
L
O
W
More clues leading to the result YELLOW
- Chicken like a canary
- Sensational duck, wicket given after loud cry
- Discarded bits of gold line considered magical reflected American vanities
- A shade cowardly
- Cowardly to express sudden pain?
- To scream “That hurt!” is cowardly
- Utter expression of pain, like coward
- 50 housed in the old squat finding chicken
- Yard with headless male chicken
- Chicken‘s cry that hurt
Buddy explains!

The straight part
We know that "chicken" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case chicken = yellow.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 YELLOW mean?
YELLOW noun- The colour of gold, butter, or a lemon; the colour obtained by mixing green and red light, or by subtracting blue from white light.
- The intermediate light in a set of three traffic lights, the illumination of which indicates that drivers should stop short of the intersection if it is safe to do so.
- One of the colour balls used in snooker, with a value of 2 points.
- (pocket billiards) One of two groups of object balls, or a ball from that group, as used in the principally British version of pool that makes use of unnumbered balls (the (yellow(s) and red(s)); contrast stripes and solids in the originally American version with numbered balls).
- A yellow card.
- Any of various pierid butterflies of the subfamily Coliadinae, especially the yellow coloured species. Compare sulphur.
- To become yellow or more yellow.
- To make (something) yellow or more yellow.
- Having yellow as its colour.
- Lacking courage.
- Characterized by sensationalism, lurid content, and doubtful accuracy.
- Far East Asian (relating to Asian people).
- Of mixed Aboriginal and Caucasian ancestry.
- High yellow.
- Related to the Liberal Democrats.
- Related to the Free Democratic Party of Germany.