The most common and most likely answer to this crossword clue is the 7 letter word NOOSING
I've seen this crossword clue in The Daily Telegraph
N
O
O
S
I
N
G
Buddy explains!
The straight part
We know that "Catching" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case catching = noosing.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 NOOSING mean?
NOOSING verb- To tie or catch in a noose; to entrap or ensnare.