Butterfly possibly following butterfly spurning latest effect of the sun? (10)
I believe the answer is:
heatstroke
'spurning latest effect of the sun?' is the definition.
I can't judge whether this defines the answer.
'butterfly possibly following butterfly' is the wordplay.
'butterfly possibly' becomes 'heat' (I can't explain this - if you can you should believe this answer much more).
'following' means one lot of letters go next to another.
'butterfly' becomes 'stroke' (butterfly stroke is a swimming stroke).
'heat'+'stroke'='HEATSTROKE'
Can you help me to learn more?
(Other definitions for heatstroke that I've seen before include "Feverish condition" , "holiday upset" , "Effect of too much sun" , "Malady from over exposure to the sun" , "Sickness" .)