Go ahead; make a loan (7)
I believe the answer is:
advance
I believe this clue is a double definition.
'go ahead' is the first definition.
(I've seen this before)
'a loan' is the second definition.
(I know that advance is a type of loan)
'make' is the link.
(Other definitions for advance that I've seen before include "Early" , "Move forward like army or loan against wage" , "Forward - loan - increase" , "necessary to be recognised?" , "Publisher's payment" .)