Take from or put into the amended text (6)
I believe the answer is:
Here is my best explanation:
'take' is the definition.
(extorting is a kind of taking)
'or put into the amended text' is the subsidiary indication.
'put into' is an insertion indicator.
'the amended' is an anagram indicator.
'text' anagrammed gives 'extt'.
'or' put inside 'extt' is 'extort'.
'from' is the link.
(Other definitions for extort that I've seen before include "Wring (money) out (by violence, etc)", "Secure money by intimidation", "Compel to pay", "Using intimidation", "fleece", "Milk", "Obtain wrongfully", "Obtain by intimidation, say money", "Obtain money with menaces" and "To bleed".)