Turn over cheap material covered in fish eggs (6)
I believe the answer is:
rotate
'turn over' is the definition.
(thesaurus)
'cheap material covered in fish eggs' is the wordplay.
'cheap material' becomes 'tat' (I am not sure about this - if you are sure you should believe this answer much more).
'covered in' means one lot of letters goes inside another.
'fish eggs' becomes 'roe' (synonyms).
'tat' inserted within 'roe' is 'ROTATE'.
Can you help me to learn more?
(Other definitions for rotate that I've seen before include "Turn around on axis or central point" , "Spin as on axle" , "Move round centre" , "Gyrate" , "Pivot" .)