Voyage to end in Fall (4,2)
I believe the answer is:
trip up
'voyage' is the definition.
The definition and answer can be both to do with motion as well as being verbs in their base form.
Maybe you can see a link between them that I can't see?
'end in fall' is the wordplay.
'end' becomes 'pu' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'in' means one lot of letters goes inside another.
'fall' becomes 'trip' (as in tripping over).
'pu' going into 'trip' is 'TRIP UP'.
'to' is the link.
Can you help me to learn more?
(Other definitions for trip up that I've seen before include "Catch out or cause to stumble" , "Go wrong" , "'Cause to stumble (4,2)'" , "Blunder" , "Cause person to stumble, or detect in error" .)