To schmooze (with) (6)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
hobnob
(Other definitions for hobnob that I've seen before include "Hang out with people of standing" , "Fraternise, mingle" , "Socialise familiarly" , "Socialise informally" , "Socialise as with the rich and famous" .)