Again, finance house primarily converts monetary unit (7)
I believe the answer is:
afghani
'monetary unit' is the definition.
(afghani is a kind of monetary unit)
'again finance house primarily converts' is the wordplay.
'primarily' says to take the initial letters.
'converts' is an anagram indicator.
The initial letters of 'finance house' is 'fh'.
'again'+'fh'='againfh'
'againfh' is an anagram of 'AFGHANI'.
(Other definitions for afghani that I've seen before include "Currency in Kabul" , "'Person from Kabul, say (7)'" , "Pashto" , "Native of Kabul, say" , "From Kabul, for example" .)