Unselfish publicist worked with pride (6-8)
I believe the answer is:
public-spirited
'unselfish' is the definition.
(similar in meaning)
'publicist worked with pride' is the wordplay.
'worked with' indicates an anagram.
'publicist' with its letters anagrammed with 'pride' can make 'PUBLIC-SPIRITED'.
(Other definitions for public-spirited that I've seen before include "Willing to help society" , "Willing to aid society" , "Willing to do things for society" .)