The most common and most likely answer to this crossword clue is the 6 letter word LITRES
L
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More clues leading to the result LITRES
Buddy explains!
The straight part
We know that "Quantity of beer perhaps" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case quantity of beer perhaps = litres.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 LITRES mean?
LITRES noun- The metric unit of fluid measure, equal to one cubic decimetre. Symbols: l, L, ℓ
- A measure of volume equivalent to a litre.