What does the cryptic crossword clue "Let sir get drunk with lots of wine? (6)" mean?

The definition is "lots of wine". The wordplay uses an anagram. anagram of LET + SIR = LITRES; definition: "lots of wine?" The answer is LITRES.

Let sir get drunk with lots of wine? (6)

Guardian Cryptic #29241 | 3 Down | 2023-11-30 flower