Im sad - he got more gold than he wanted! (5)
I believe the answer is:
midas
'more gold than he wanted' is the definition.
The definition suggests a singular noun which matches the answer.
'im sad he' is the wordplay.
'im sad' can be anagrammed to 'MIDAS'.
But, I am not clear how the anagram is indicated.
'got' is the link.
Can you help me to learn more?
(Other definitions for midas that I've seen before include "King of Phrygia who had a golden touch" , "Legendary king who could turn everything to gold" , "Legendary king whose touch turned things to gold" , "Greek mythological king with money-making touch" , "Mythical king who had the power to turn everything to gold" .)