Fermented milk in slops trough behind the yard (7)
I believe the answer is:
yoghurt
'fermented milk' is the definition.
(I've seen this before)
'slops trough behind the yard' is the wordplay.
I cannot really understand how this works, but
an anagram of 'trough' is 'oghurt' which is located in the answer.
'yard' could be 'y' (abbreviation) and 'y' is found within the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'in' is the link.
Can you help me to learn more?
(Other definitions for yoghurt that I've seen before include "cultural production" , "spoiled dairy product" , "Cultured food" , "Curdled milk dish" , "Curdled-milk dessert" .)