Prod so as to make fall (4)
I believe the answer is:
'fall' is the definition.
(I know that fall can be written as drop)
'prod so as to' is the wordplay.
'prod' can be anagrammed to 'DROP'.
But, I'm not clear how the anagram is indicated.
'make' acts as a link.
Can you help me to learn more?
(Other definitions for drop that I've seen before include "Bit of water" , "Not a lot of water" , "Spot" , "Fall; delivery" , "shed" .)