Trick to catch duck causing stir (5)
I believe the answer is:
rouse
'stir' is the definition.
(I've seen this in another clue)
'trick to catch duck' is the wordplay.
I cannot quite understand how this works, but
'duck' could be 'o' (resembles zero - 'duck' in cricket) and 'o' is found within the answer.
'trick' could be 'ruse' (I've seen this before) and 'ruse' is present in the leftover letters.
This accounts for all the letters.
This explanation may well be incorrect...
'causing' acts as a link.
Can you help me to learn more?
(Other definitions for rouse that I've seen before include "Stir up; excite" , "Cause to wake up, stimulate" , "Cause to become awake" , "Move" , "Activate, wake up" .)