Liquidation for functional part? (8,3)
I believe the answer is:
business end
This clue is a double definition.
'liquidation' is the first definition.
(as in the business ends with liquidation)
'functional part?' is the second definition.
'for' is the link.
(Other definitions for business end that I've seen before include "Liquidation" , "That's the bit that works" , "Device's functional part" , "part doing the work" .)