Disheartened due to winter event's heavy rain (6)
I believe the answer is:
deluge
'heavy rain' is the definition.
(I've seen this before)
'disheartened due to winter event's' is the wordplay.
'disheartened' means to remove the middle letters.
'to' says to put letters next to each other.
'winter event' becomes 'luge' (I have seen 'Olympic event' mean 'luge' so perhaps 'event' could also mean 'luge'. I am not sure about the 'winter' bit.).
'due' with its middle taken out is 'de'.
'de'+'luge'='DELUGE'
Can you help me to learn more?
(Other definitions for deluge that I've seen before include "Swamp" , "Cloudburst, downpour" , "Huge downpour" , "A heavy fall of rain (6)" , "Inundation" .)