Can anyone parse this for me? Last week's New Scientist Cryptic 8 down 'Preload expanding speed gun technology (7,5)'. The answer is doppler radar but I can only see an anagram of preload as part of it. Where does the rest come from?
This is a letter bank clue as indicated by “expanding.” You get DOPPLER RADAR from using “preload” as a letter bank, anagramming and reusing letters as needed.