Enquire intrusively (3)
I believe the answer is:
pry
'enquire intrusively' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for pry that I've seen before include "Poke into matters not your concern" , "Intrusively enquire" , "Snoop, poke about" , "Look inquisitively into private matters" , "act curiously" .)