'Spy involved in developing Korean resistance' -- Observer (4,6)
I believe the answer is:
nosy parker
'observer' is the definition.
Both the definition and answer are singular nouns.
Maybe there's a link between them I don't understand?
'spy involved in developing korean resistance' is the wordplay.
'involved' indicates anagramming the letters (involved can mean confusing or complex).
'in' means one lot of letters goes inside another.
'developing' is an anagram indicator (letters developed into a new form).
'resistance' becomes 'r' (electronics abbreviation).
'spy' with letters rearranged gives 'syp'.
'korean'+'r'='koreanr'
'koreanr' with letters rearranged gives 'noarker'.
'syp' placed into 'noarker' is 'NOSY-PARKER'.
Can you help me to learn more?
(Other definitions for nosy parker that I've seen before include "Interested party" , "Prying person" , "snoop" , "busybody" .)