New York city swamped by pharmaceuticals (5)
I believe the answer is:
utica
'new york city' is the definition.
(I've seen this before)
'swamped by pharmaceuticals' is the wordplay.
'swamped by' indicates the answer is hidden within the clue.
'UTICA' can be found hidden inside 'pharmaceuticals'.
(Other definitions for utica that I've seen before include "city of ancient Africa?" , "Punic city" , "old African city" , "New York city" .)