Coordinate review of classics, basically (8)
I believe the answer is:
abscissa
'coordinate' is the definition.
(abscissa is a kind of coordinate)
'review of classics basically' is the wordplay.
'review' is a reversal indicator.
'of' says the answer is hidden in the clue.
'assicsba' is hidden in the letters of 'classics basically'.
'assicsba' backwards is 'ABSCISSA'.
(Other definitions for abscissa that I've seen before include "X-coordinate on a graph" , "Intercept" , "quantity on graph" , "X co-ordinate" .)