Warm welcome (3)
'warm welcome' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for hug that I've seen before include "Embrace closely" , "Bear-like embrace?" , "Embrace (like a bear?)" , "A hearty embrace as of bear" , "Clasp" .)
(Other definitions for open arms that I've seen before include "Pans Rome (anag.)" , "welcome wiyh....,....greet warmly" , "With which one is heartily welcomed" , "Welcoming attitude" , "With which to offer hearty welcome" .)