Foreign money haphazard -- order lost (4)
I believe the answer is:
rand
'foreign money' is the definition.
(currency of South Africa)
'haphazard order lost' is the wordplay.
'haphazard' becomes 'random' ('random' can be similar in meaning to 'haphazard').
'order' becomes 'om' (order of merit).
'lost' indicates named letters should be taken away.
'random' with 'om' removed is 'RAND'.
(Other definitions for rand that I've seen before include "Overseas money" , "our 1/4 Across [GOLD MEDALLIST] in 1964" , "Currency of South Africa" , "Monetary unit in South Africa" , "Foreign currency" .)