The most common and most likely answer to this crossword clue is the 6 plus 3 letter word CASTOR OIL
I've seen this crossword clue in The Times
C
A
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O
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L
More clues leading to the result CASTOR OIL
- Accountants joining troops in work moving medicine
- Wind MP Nancy trapped? Here’s a laxative
- Purgative for use when badly cooked roast contributes to wind
- A lubricant cools it, a drop of radiator fluid
- Actor so out of sorts, endlessly unwell — medicine needed
- Medicinal stuff: a supply, running short, is lashed by wind
- Like to run in loop supplying aid to catharsis
Buddy explains!

The straight part
We know that "moving medicine" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case moving medicine = castor oil.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.