The terms of this fresh scheme absolutely matter! (7)
I believe the answer is:
shebang
'matter' is the definition.
(shebang means any matter or situation)
'the terms of this fresh scheme absolutely' is the wordplay.
'the terms of' indicates one should take the final letters (I've seen 'term of' mean this (term can mean the terminus or ending of the word)).
'absolutely' becomes 'bang' (eg 'bang up to date' means 'absolutely up to date').
The last letters of 'this fresh scheme' are 'she'.
'she'+'bang'='SHEBANG'
(Other definitions for shebang that I've seen before include "(Whole) kit and caboodle" , "Lot" , "Entire operation" , "The entire system" , "Whole affair" .)