The most common and most likely answer to this crossword clue is the 6 letter word KINDLE
I've seen this crossword clue in The Guardian
K
I
N
D
L
E
More clues leading to the result KINDLE
- Arouse class with article in French
- Stimulate class left without paper
- Arouse and race the French
- Light cattle eating primarily dandelion leaves
- Electronic gadget linked with hacking
- Switch linked to light
- Light reading facilitated by this?
- Inflame family that’s led astray
- Light reader
- Fire up learner admitted by helpful European
Buddy explains!

The straight part
We know that "Light/reader" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case light/reader = kindle.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 KINDLE mean?
KINDLE verb- To start (a fire) or light (a torch, a match, coals, etc.).
- To arouse or inspire (a passion, etc).
- To begin to grow or take hold.
- (collective) A group of kittens.
- (of a rabbit or hare) To bring forth young; to give birth.
- (of an animal) pregnant