Try to land (5,4)
I believe the answer is:
touch down
This might be a double definition.
'try' is the first definition.
Although both the answer and definition are verbs in their base form, I cannot see how one could define the other.
'land' is the second definition.
(touching down is a kind of landing)
'to' acts as a link.
Can you help me to learn more?
(Other definitions for touch down that I've seen before include "Land" , "Reach end of flight" .)