Prefix for legal (4)
I believe the answer is:
para
'prefix for legal' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for para that I've seen before include "Soldier (shortened)" , "soldier potentially dropped" , "Soldier who jumps to order? (abbr)" , "Soldier that jumps from planes" , "abbreviated passage having unity" .)