Cryptic crossword clue
Infection reduced and passed quickly, from what we hear 3

The most common and most likely answer to this crossword clue is the 3 letter word FLU

I've seen this crossword clue in The Sunday Telegraph
F
L
U

Buddy explains!

The straight part
We know that "Infection reduced" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case infection reduced = flu.
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 FLU mean?

FLU noun
  1. Influenza.
  2. Stomach flu.

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