Fish steak ordered (5)
I believe the answer is:
skate
'fish' is the definition.
(skate is a kind of fish)
'steak ordered' is the wordplay.
'ordered' is an anagram indicator.
'steak' anagrammed gives 'SKATE'.
(Other definitions for skate that I've seen before include "Flat fish" , "Fish of ray family" , "Ice-gliding blade; fish" , "Runner" , "Food fish" .)