Liable to be found face-down (5)
I believe the answer is:
prone
This could be a double definition.
'liable' is the first definition.
(both can mean having a tendency for something)
'face-down' is the second definition.
(I've seen this in another clue)
'to be found' acts as a link.
This may not be correct. Some or all of it may belong to one of the definitions.
Can you help me to learn more?
(Other definitions for prone that I've seen before include "Lying face down - inclined" , "Recumbent, likely" , "Given" , "Lying face downwards" , "Lying face down or likely to do something" .)