Unfortunately get rain around start of afternoon (it might be good for lawn) (8)
I believe the answer is:
'unfortunately get rain around start of afternoon it might be good for lawn' is the definition.
I can't tell whether this definition defines the answer.
'unfortunately get rain around start of afternoon' is the wordplay.
'unfortunately' indicates an anagram (a bad or unfortunate spelling).
'around' is an insertion indicator.
'start of' indicates taking the first letters.
The initial letter of 'afternoon' is 'a'.
'getrain' with letters rearranged gives 'aerting'.
'aerting' placed around 'a' is 'AERATING'.
Can you help me to learn more?
(Other definitions for aerating that I've seen before include "Exposing to air" , "Putting the fizz into mineral water" .)