Smoked herrings (7)
I believe the answer is:
kippers
'smoked herrings' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for kippers that I've seen before include "Have they dropped off" , "in bed?" , "Food for those that have smoked" , "Smoked fish" , "Smoked herrings for skipper" .)