Executives ring enemy about legal actions (3,2,4,5)
I believe the answer is:
men in grey suits
'executives' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.
'ring enemy about legal actions' is the wordplay.
'about' indicates anagramming the letters.
'legal actions' becomes 'suits' ('suit' can be a synonym of 'legal action').
'ring'+'enemy'='ringenemy'
'ringenemy' anagrammed gives 'meningrey'.
'meningrey'+'suits'='MEN IN GREY SUITS'
Can you help me to learn more?
(Other definitions for men in grey suits that I've seen before include "Power brokers" , "Civil servants" .)