Cheapskate has yen for being unhappy (6)
I believe the answer is:
misery
'for being unhappy' is the definition.
I can't judge whether this definition defines the answer.
'cheapskate has yen' is the wordplay.
'cheapskate' becomes 'miser' (cheapskate can mean a miserly person).
'has' means one lot of letters go next to another.
'yen' becomes 'y' (resembles the symbol for the currency of Japan).
'miser'+'y'='MISERY'
Can you help me to learn more?
(Other definitions for misery that I've seen before include "Wretched conditions" , "Great suffering" , "Despair" , "''. . . . . . loves company''" , "Great distress or discomfort" .)