It’s held to put a man out (5)
I believe the answer is:
catch
'out' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Perhaps you can see an association between them that I can't see?
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for catch that I've seen before include "Hear < hit" , "Stop the motion, of a ball say" , "Fastener on door or window" , "Desirable partner" , "Something trapped" .)