The most common and most likely answer to this crossword clue is the 6 letter word BROWSE
I've seen this crossword clue in The Guardian
B
R
O
W
S
E
More clues leading to the result BROWSE
- Work on the Web to happen to involve arguments
- Look casually at hairy things, needing microscope ultimately
- Look around terraces in outskirts of Basingstoke
- Peruse file obstructing stock problem
- Arguments observed in live feed
- Idly read and eat
- Read casually, gets worse in translation
- Look round, having heard bee within flower
- Be a surfer, initially wearing surprisingly sober clothes
- Graze first of ewes on hilltops
Buddy explains!

The straight part
We know that "Read casually" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case read casually = browse.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 BROWSE mean?
BROWSE noun- Young shoots and twigs.
- Fodder for cattle and other animals.
- To scan, to casually look through in order to find items of interest, especially without knowledge of what to look for beforehand.
- To move about while sampling, such as with food or products on display.
- To navigate through hyperlinked documents on a computer, usually with a browser.
- (of an animal) To move about while eating parts of plants, especially plants other than pasture, such as shrubs or trees.
- To feed on, as pasture; to pasture on; to graze.