Urge a fellow to provide publicist (5,5)
I believe the answer is:
press agent
'publicist' is the definition.
(press agent is a kind of publicist)
'urge a fellow' is the wordplay.
'urge' becomes 'press' (synonyms).
'fellow' becomes 'gent' (synonyms).
'press'+'a'+'gent'='PRESS-AGENT'
'to provide' is the link.
(Other definitions for press agent that I've seen before include "PR person" , "PA" , "Person seeking favourable publicity on behalf a client" , "publicist" .)