Coin one managed to find at last (4)
I believe the answer is:
rand
'coin' is the definition.
'one managed to find at last' is the wordplay.
'one managed' becomes 'ran' (both can mean organised or was in charge of).
'at last' suggests the final letters.
The last letter of 'find' is 'd'.
'ran'+'d'='RAND'
(Other definitions for rand that I've seen before include "Overseas money" , "Currency of South Africa" , "Monetary unit in South Africa" , "South African money" , "Foreign currency" .)