Worker falls over in Cork - as a result of this, is unconscious briefly (6)
I believe the answer is:
catnap
'a result of this is unconscious briefly' is the definition.
The definition suggests a singular noun which matches the answer.
'worker falls over in cork' is the wordplay.
'worker' becomes 'ant' (worker is a type of ant).
'falls over' says the letters should be written in reverse (I've seen 'falling over' mean this (letters falling back)).
'in' means one lot of letters goes inside another.
'cork' becomes 'cap' (I can't justify this - if you can you should give a lot more credence to this answer).
'ant' reversed gives 'tna'.
'tna' put within 'cap' is 'CATNAP'.
'as' acts as a link.
Can you help me to learn more?
(Other definitions for catnap that I've seen before include "little snooze" , "For a rest" , "Drop off" , "Forty winks (for moggy?)" , "(Tom's) snooze?" .)