The most common and most likely answer to this crossword clue is the 8 letter word IMAGINES
I've seen this crossword clue in The Guardian
I
M
A
G
I
N
E
S
More clues leading to the result IMAGINES
- I don't like contents of best pictures
- Thinks of ancient sorcerers hiding in trees, powerless
- Pictures in one book of maps taken from periodicals
- Pictures of wise men entering home, leaders of esoteric society
- Pictures popular in doubles
- Dreams about one gas mine explosion
- Independent publications losing Azerbaijani leaders’ pictures
- Daydreams as Gemini being versatile does
Buddy explains!

The straight part
We know that "pictures" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case pictures = imagines.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 IMAGINES mean?
IMAGINES noun- The final developmental stage of an insect after undergoing metamorphosis.
- An idealised concept of a loved one, formed in childhood and retained unconsciously into adult life, the basis for the psychological formation of personality archetypes.
- A short fanfic or prompt placing a reader insert in a novel scenario with a character or celebrity.
- To form a mental image of something; to envision or create something in one's mind.
- To believe in something created by one's own mind.
- To assume
- To conjecture or guess
- To use one's imagination
- To contrive in purpose; to scheme; to devise.