This thing had little value but meant much (3)
I believe the answer is:
far
'much' is the definition.
(I've seen this in another clue)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for far that I've seen before include "Distant" , "A long, long way to go" , "At a great distance way" , "Remote" , "Very much" .)