Jack’s hat? (5)
I believe the answer is:
Here is my best explanation:
This clue could be a double definition.
'jack's' 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?
'hat?' is the second definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.
(Other definitions for straw that I've seen before include "Plant fibre used as fodder", "Pale-yellow - through which one can drink", "Pale yellow colour", "corny stuff", "Residue of cereal crop", "Stalks of corn", "Means to absorb", "Corn stalks", "Dry stalks" and "Dried stalks for fodder".)