It lets you in and gets you something to eat (6)
I believe the answer is:
entree
'something to eat' is the definition.
(entree is a kind of food)
'it lets you in and gets' is the wordplay.
'it' becomes 'e' ('e' can mean 'electronic' which is similar to 'IT').
'lets you in' becomes 'tree' (I can't explain this - if you can you should give a lot more credence to this answer).
'and' becomes 'n' (common abbreviation for 'and').
'gets' is an insertion indicator.
'e'+'tree'='etree'
'etree' placed around 'n' is 'ENTREE'.
'you' is the link.
Can you help me to learn more?
(Other definitions for entree that I've seen before include "The right ot privilege of admission" , "The right to go in to the dish" , "Dinner course" , "Privilege of admission, or food dish" , "Main course of a meal" .)