Fish roll? (5)
I believe the answer is:
skate
This clue is a double definition.
'fish' is the first definition.
(skate is a kind of fish)
'roll?' is the second definition.
(as in rollerskates)
(Other definitions for skate that I've seen before include "Runner" , "Complete, 19-less" , "Takes off like large flatfish" , "Large marine fish" , "Flat fish" .)