The most common and most likely answer to this crossword clue is the 8 letter word PASTE-UP
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More clues leading to the result PASTE-UP
Buddy explains!
The straight part
We know that "composition/collage" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case composition/collage = paste-up.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 PASTE-UP mean?
PASTE-UP noun- A sheet on which text, images, etc. are pasted in order to be copied and printed, such as for an advertisement.