Intrude or pry (9)
I believe the answer is:
interfere
I believe this is a double definition.
'intrude' is the first definition.
(thesaurus)
'pry' is the second definition.
(I've seen this in another clue)
(Other definitions for interfere that I've seen before include "Meddle, poke into" , "Obstruct, pry" , "Meddle in someone else's business" , "Stick one's oar in" , "Come between, intervene" .)