Old marshal not coming down for long (3)
I believe the answer is:
yen
'long' is the definition.
(I know that yen is a type of long)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for yen that I've seen before include "Longing, hankering after" , "Unit of money in Japan" , "Itch, desire" , "Pine" , "Itch, craving" .)