Demonstrate affection pressingly (3)

I believe the answer is:
hug
'demonstrate' is the definition.
Although both the answer and definition are verbs in their base form, I cannot see how one could define the other.
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for hug that I've seen before include "Clasp" , "Embrace (like a bear?)" , "Tightly embrace" , "Embrace closely" , "Tight embrace" .)
