Financial liability could be explosive (6)
I believe the answer is:
charge
This might be a double definition.
'financial liability' is the first definition.
'charge' can be an answer for 'liability' (charge is a kind of liability). I'm not sure about the 'financial' bit.
'be explosive' is the second definition.
(I've seen this before)
'could' acts as a link.
Can you help me to learn more?
(Other definitions for charge that I've seen before include "Amount to pay - attack" , "Control" , "Price for a service" , "Accuse; load, fill" , "Price asked; fill" .)