The most common and most likely answer to this crossword clue is the 5 letter word PIXEL
P
I
X
E
L
More clues leading to the result PIXEL
Buddy explains!

The straight part
We know that "Element of digital content" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case element of digital content = pixel.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 PIXEL mean?
PIXEL noun- One of the tiny dots that make up the representation of an image in a computer's memory.
- One of the squares that make up a pixel art work or a zoomed in image in a computer.
- To create computer graphics by editing individual pixels.