The "so few” in a WWII speech (3)

I believe the answer is:

raf

(Other definitions for raf that I've seen before include "Royal Air Force (abbr.)" , "Airforce of Great Britain" , "It fought Battle of Britain" .)

I've seen this clue in The Wall Street Journal.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.