It controls the waves though the rain is wild (7)
I believe the answer is:
hairnet
'it controls the waves' is the definition.
The definition suggests a singular noun which matches the answer.
'the rain is wild' is the wordplay.
'is wild' indicates anagramming the letters.
'the'+'rain'='therain'
'therain' is an anagram of 'HAIRNET'.
'though' acts as a link.
Can you help me to learn more?
(Other definitions for hairnet that I've seen before include "It keeps locks in place" , "In heart (anag)" , "It protects locks" , "The rain (anag) - used after shampooing?" , "keeper of locks" .)