Bet grunge fan is the first to print (9)
I believe the answer is:
'the first to print' is the definition.
I can't judge whether this definition defines the answer.
'bet grunge fan' is the wordplay.
'fan' is an anagram indicator (I've seen 'fanned' mean this (I've seen this in other clues)).
'betgrunge' with letters rearranged gives 'GUTENBERG'.
'is' acts as a link.
Can you help me to learn more?
(Other definitions for gutenberg that I've seen before include "Pioneer printer" , "German printer of a 15th century Bible" , "German printing pioneer" , "Publisher" , "He invented movable-type printing" .)