Pink room used to store money (6)
I believe the answer is:
salmon
'pink' is the definition.
(I know that salmon is a type of pink)
'room used to store money' is the wordplay.
I cannot really see how this works, but
'money' could be 'm' (abbreviation in economics) and 'm' is found in the answer.
'room' could be 'salon' (salon is a kind of room) and 'salon' is found within the leftover letters.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for salmon that I've seen before include "Fish; pink colour" , "Pink-fleshed fish" , "pink-orange in colour" , "Legendary fish of knowledge" , "Freshwater fish; colour" .)