Can be converted into capital money (7)
I believe the answer is:
finance
'money' is the definition.
(finance is the management of money)
'can be converted into capital' is the wordplay.
'be converted' indicates an anagram.
'into' indicates putting letters inside.
'capital' becomes 'fine' (I can't explain this - if you can you should believe this answer much more).
'can' is an anagram of 'anc'.
'anc' going within 'fine' is 'FINANCE'.
Can you help me to learn more?
(Other definitions for finance that I've seen before include "Supporting rhino" , "Provide cash for" , "Provide funds for" , "Back" , "Money management" .)