Cryptic crossword clue
Choking conditions beginning to scare cat 4

The most common and most likely answer to this crossword clue is the 4 letter word SMOG

I've seen this crossword clue in The Daily Telegraph
S
M
O
G


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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 SMOG mean?

SMOG noun
  1. A noxious mixture of particulates and gases that is the result of urban air pollution.
SMOG verb
  1. To get a smog check; to check a vehicle or have it checked for emissions.

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