Cross after eastern craft turned over (5)
I believe the answer is:
extra
'over' is the definition.
(extra can mean left over)
'cross after eastern craft turned' is the wordplay.
'cross' becomes 'x' (an X is a cross).
'after' says to put letters next to each other.
'eastern' becomes 'e'.
'craft' becomes 'art' (both can mean cunning or trickery).
'turned' says the letters should be written in reverse.
'art' back-to-front is 'tra'.
'x' put after 'e' is 'ex'.
'ex'+'tra'='EXTRA'
(Other definitions for extra that I've seen before include "Actor in crowd scene, no lines" , "someone acting in a crowd" , "he plays his part" , "Bit actor in film" , "Taxer (anag.)" .)