The most common and most likely answer to this crossword clue is the 5 letter word SEIZE
I've seen this crossword clue in The Times
S
E
I
Z
E
More clues leading to the result SEIZE
- Catch an Edith Piaf number?
- Take sixteen to Paris
- Take the 4x4 across the channel
- Capture a number of French
- Half of nuclear power plant includes electron capture
- Capture spies allegedly
- Catch notes on the radio
- Arrest Catholic extremists, did you say?
- Grasp magnitude of concealing extraterrestrial origin
- Impound drug in bulk
Buddy explains!

The straight part
We know that "Catch" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case catch = seize.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 SEIZE mean?
SEIZE verb- To deliberately take hold of; to grab or capture.
- To take advantage of (an opportunity or circumstance).
- To take possession of (by force, law etc.).
- To have a sudden and powerful effect upon.
- To bind, lash or make fast, with several turns of small rope, cord, or small line.
- To fasten, fix.
- To lay hold in seizure, by hands or claws (+ on or upon).
- To have a seizure.
- To bind or lock in position immovably; see also seize up.
- To submit for consideration to a deliberative body.
- (with of) To cause (an action or matter) to be or remain before (a certain judge or court).