Developed area is hosting start of long downhill skiing event (7)
I believe the answer is:
aerials
'developed area is hosting start of long downhill skiing event' is the definition.
I can't tell whether this definition defines the answer.
'developed area is hosting start of long' is the wordplay.
'developed' indicates anagramming the letters.
'hosting' indicates putting letters inside (inserted letters are welcomed in or hosted).
'start of' says to take the initial letters.
The initial letter of 'long' is 'l'.
'area'+'is'='areais'
'areais' is an anagram of 'aerias'.
'aerias' placed around 'l' is 'AERIALS'.
Can you help me to learn more?
(Other definitions for aerials that I've seen before include "They're on the roof for reception" , "Antennae or transmission rods" , "Antennas" , "Receivers" .)