Beg urgent reforms for pioneering pressman? (9)
I believe the answer is:
gutenberg
'pioneering pressman?' is the definition.
(Johannes Gutenberg)
'beg urgent reforms' is the wordplay.
'reforms' indicates an anagram.
'beg'+'urgent'='begurgent'
'begurgent' is an anagram of 'GUTENBERG'.
'for' is the link.
(Other definitions for gutenberg that I've seen before include "German printing pioneer" , "He invented movable-type printing" , "Publisher" , "German printer of a 15th century Bible" , "Pioneer printer" .)