They might cause a stink after Christmas dinner (7)
I believe the answer is:
sprouts
'they' is the definition.
Both the answer and definition are plural nouns.
Maybe they are linked in a way I don't understand?
'cause a stink after christmas dinner' is the wordplay.
I cannot really see how this works, but
'cause' could be 'pro' (pro is a kind of cause) and 'pro' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
'might' is the link.
Can you help me to learn more?
(Other definitions for sprouts that I've seen before include "Grows vegetables" , "Small cabbage-like veg." , "Brussels vegetables" , "Green vegetables" , "[TRIMMING]" .)