Take it as read that play amuses (6)
I believe the answer is:
assume
'take it as read that' is the definition.
'assume' can be an answer for 'take' (I've seen this in another clue). I'm not certain of the rest of the definition.
'play amuses' is the wordplay.
'play' indicates an anagram.
'amuses' with letters rearranged gives 'ASSUME'.
Can you help me to learn more?
(Other definitions for assume that I've seen before include "Believe" , "Wrongly take" , "Tale of the gods" , "Accept as true without proof" , "Take to be the case" .)