Cattle illness resulting from rise of strange, nasty weather? (7)
I believe the answer is:
murrain
'cattle illness' is the definition.
'murrain' can be an answer for 'illness' (murrain is a kind of illness). I'm unsure of the 'cattle' bit.
'rise of strange nasty weather?' is the wordplay.
'rise of' shows that the letters should be reversed in order (in a down clue, letters go up).
'strange' becomes 'rum' (synonyms).
'nasty weather?' becomes 'rain' (rain is a kind of weather. I am not sure about the 'nasty' bit.).
'rum' backwards is 'mur'.
'mur'+'rain'='MURRAIN'
'resulting from' is the link.
Can you help me to learn more?
(Other definitions for murrain that I've seen before include "Cattle plague" , "Cattle-plague" , "Cattle disease" .)