Duck or ducks from Slovenia (4)
I believe the answer is:
love
'duck' is the definition.
(duck and love mean zero in cricket and tennis)
'ducks from slovenia' is the wordplay.
'LOVE' is hidden within the letters.
But, I am not sure how this is indicated.
'or' is the link.
Can you help me to learn more?
(Other definitions for love that I've seen before include "Ardent emotion" , "No points" , "Passionate desire" , "Serenade" , "See 22" .)