The most common and most likely answer to this crossword clue is the 4 letter word COKE
I've seen this crossword clue in The Guardian
C
O
K
E
More clues leading to the result COKE
- Solid fuel, fine stored in church
- Fuel for heating drink
- Fuel sanction got round by church
- Drink
- “Soft drink?”, one snorts
- Drink made by company keen to drop English name
- Drug king apprehended by former athletics star
- Drink [not] acceptable in church
- Drink carbon product for fuel
- Drink approved in the church
Buddy explains!

The straight part
We know that "drugs" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case drugs = coke.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 COKE mean?
COKE noun- Solid residue from roasting coal in a coke oven; used principally as a fuel and in the production of steel and formerly as a domestic fuel.
- To produce coke from coal.
- To turn into coke.
- To add deleterious carbon deposits as a byproduct of combustion.
- Cocaine.
- Cola-based soft drink.
- A bottle, glass or can of a cola-based soft drink.
- Any soft drink, regardless of type.