Stray sheep going round with a duck (4)
I believe the answer is:
roam
'stray' is the definition.
(I know that stray can be written as roam)
'sheep going round with a duck' is the wordplay.
I cannot really understand how this works, but
'round' could be 'o' (round can mean a round object) and 'o' is present in the answer.
'sheep' could be 'ram' (male sheep) and 'ram' is located in the leftover letters.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for roam that I've seen before include "Wander about aimlessly" , "range" , "Travel widely" , "Stray" , "Rove or ramble" .)