The most common and most likely answer to this crossword clue is the 5 letter word CHAFF
I've seen this crossword clue in The Daily Telegraph
C
H
A
F
F
More clues leading to the result CHAFF
- On a farm, refuse drink very loudly
- Tease short bloke very loudly
- Bird an inch short? It’ll blow away
- Inch taken off bird’s rib
- It’s not important, ballroom dance’s repeats both being foxtrot
- Waste drink with considerable volume
- Banter in church? Answer very loudly
- Light-hearted teasing from her, initially, in snack bar
- Bird losing a bit of a foot in rubbish
- Rubbish banter
Buddy explains!

The straight part
We know that "Kid" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case kid = chaff.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 CHAFF mean?
CHAFF noun- The inedible parts of a grain-producing plant.
- Straw or hay cut up fine for the food of cattle.
- Any excess or unwanted material, resource, or person; anything worthless.
- Light jesting talk; banter; raillery.
- Loose material, e.g. small strips of aluminum foil dropped from aircraft, intended to interfere with radar detection.
- To use light, idle language by way of fun or ridicule; to banter.
- To make fun of; to turn into ridicule by addressing in ironical or bantering language; to quiz.