Fallback position (7)
I believe the answer is:
default
'fallback position' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for default that I've seen before include "Fail to pay debt" , "Act of failing to meet a payment" , "Fall-back option" , "Fail to pay what's due" , "basic computer programming" .)