Sandwich in package (4)
I believe the answer is:
wrap
This could be a double definition.
'sandwich' is the first definition.
The definition and answer can be both to do with contact as well as being verbs in their base form.
Maybe there's an association between them I don't understand?
'package' is the second definition.
(I've seen this in another clue)
'in' is the link.
Can you help me to learn more?
(Other definitions for wrap that I've seen before include "Pack in paper; shawl" , "Flatbread snack" , "Envelop" , "Fold covering around something" , "Enclose completely" .)