Parachutists' descent finding ditch (4)
I believe the answer is:
drop
This could be a double definition.
'parachutists' descent' is the first definition.
'drop' can be an answer for 'descent' (drop is a kind of descent). I am not certain of the 'parachutists'' bit.
'ditch' is the second definition.
(thesaurus)
'finding' acts as a link.
Can you help me to learn more?
(Other definitions for drop that I've seen before include "Fall in small globule" , "Go to ground" , "A little medicine" , "Wee dram" , "Discontinue; sink" .)