Pry, eavesdrop (5)
I believe the answer is:
snoop
This clue is a double definition.
'pry' is the first definition.
(I've seen this in another clue)
'eavesdrop' is the second definition.
(thesaurus)
(Other definitions for snoop that I've seen before include "Investigate; pry" , "Stick one's nose in" , "Furtively look around" , "Be nosy" , "Informally, pry inquisitively" .)