The most common and most likely answer to this crossword clue is the 8 letter word MATERIAL
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Buddy explains!
The straight part
We know that "Relevant/stuff" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case relevant/stuff = material.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 MATERIAL mean?
MATERIAL noun- Matter which may be shaped or manipulated, particularly in making something.
- Text written for a specific purpose.
- A sample or specimens for study.
- Cloth to be made into a garment. Fabric.
- The people collectively who are qualified for a certain position or activity.
- Related data of various kinds, especially if collected as the basis for a document or book.
- The substance that something is made or composed of.
- All of a player's pieces and pawns on the chessboard.
- To form from matter; to materialize.
- Having to do with matter; consisting of matter.
- Worldly, as opposed to spiritual.
- Significant.