It provides air to area meandering by river (7)
I believe the answer is:
aerator
'it provides air' is the definition.
The definition suggests a singular noun which matches the answer.
'to area meandering by river' is the wordplay.
'meandering' indicates anagramming the letters.
'by' says to put letters next to each other.
'river' becomes 'r' (abbreviation for river).
'area' anagrammed gives 'aera'.
'to' after 'aera' is 'aerato'.
'aerato'+'r'='AERATOR'
Can you help me to learn more?
(Other definitions for aerator that I've seen before include "It provides the fizz" , "One may emit much gas" , "Device making bubbles in a fish tank" , "Maybe fork" , "Device such as used in tropical fish tanks" .)