Cooked in London eatery (4)
I believe the answer is:
done
'cooked' is the definition.
(similar in meaning)
'in london eatery' is the wordplay.
'in' says the answer is hidden in the clue.
'DONE' can be found hidden inside 'london eatery'.
(Other definitions for done that I've seen before include "Thoroughly cooked; accomplished" , "This sort of thing is socially acceptable" , "Finished or ended" , "Completed" , "Robbed" .)