The most common and most likely answer to this crossword clue is the 7 letter word CHEMIST
C
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More clues leading to the result CHEMIST
- Scientific man Nietzsche mistrusted to an extent
- Scientist of dodgy ethics taking millions in
- Backsliding setter’s packing trunk for drug dealer
- One dispenses with finally being taken in by church obscurity
- Revolutionary film dispenser
- Work ethics to welcome mathematical chief boffin
- Revolutionary spray dispenser
- Scientist popping note in box
- Scientist‘s note in box
- Revolutionary film showing drug dealer
Buddy explains!

The straight part
We know that "I produce something you can rattle up and down in a box" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case i produce something you can rattle up and down in a box = chemist.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 CHEMIST mean?
CHEMIST noun- A person who specializes in the science of chemistry, especially at a professional level.
- A pharmacist.
- A pharmacy.
- An alchemist.