Parts of Poplar East? (5)
I believe the answer is:
areas
'parts' is the definition.
(area is a kind of part)
'of poplar east?' is the wordplay.
'of' says the answer is hidden in the clue.
'AREAS' is hidden within 'poplar east'.
(Other definitions for areas that I've seen before include "Zones" , "Localities" , "Geographical regions" , "Spaces covered by two-dimensional surfaces" , "Places" .)