A Serb edited an American's last letter about energy current (3,6)
I believe the answer is:
sea breeze
'current' is the definition.
The answer and definition can be both types of natural phenomena as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'a serb edited an american's last letter about energy' is the wordplay.
'edited' indicates anagramming the letters.
'an american's' becomes 'ee' (I can't explain this - if you can you should believe this answer much more).
'last letter' becomes 'z' (last letter of the alphabet).
'about' means one lot of letters goes inside another.
'energy' becomes 'e' (physics symbol as in E=mce).
'serb' anagrammed gives '[serb]'.
'[serb]'+'ee'+'z'='sebreez'
'a' put inside 'sebreez' is 'seabreez'.
'seabreez'+'e'='SEA-BREEZE'
Can you help me to learn more?
(Other definitions for sea breeze that I've seen before include "Vodka-based cocktail" , "Maritime wind" , "that creates a cool ambience around 6 [ISLE] ?" , "Onshore wind; cocktail" , "Doctor" .)