Cross after European craft turned over (5)
I believe the answer is:
extra
'over' is the definition.
(I've seen this before)
'cross after european craft turned' is the wordplay.
'cross' becomes 'x' (X is cross-shaped).
'after' means one lot of letters go next to another.
'european' becomes 'e' (abbreviation e.g. EU).
'craft' becomes 'art' (I've seen this before).
'turned' shows that the letters should be reversed in order.
'art' back-to-front is 'tra'.
'x' after 'e' is 'ex'.
'ex'+'tra'='EXTRA'
(Other definitions for extra that I've seen before include "spotted at rear of the platoon?" , "fortuitous run" , "more than required" , "Studio crowd player" , "special edition of the paper" .)