Milk from humble educator (5)
I believe the answer is:
bleed
'milk' is the definition.
(thesaurus)
'from humble educator' is the wordplay.
'from' indicates the answer is hidden within the clue.
'BLEED' is hidden in the letters of 'humble educator'.
(Other definitions for bleed that I've seen before include "Squeeze money out of" , "Shed blood" , "Lose life-sustaining fluid" , "What would ancient doctor do" , "Haemorrhage" .)