Small bit of land between Paris/Leipzig (4)
I believe the answer is:
isle
'small bit of land' is the definition.
(small island)
'between parisleipzig' is the wordplay.
'between' indicates a hidden word.
'ISLE' is hidden in the letters of 'parisleipzig'.
(Other definitions for isle that I've seen before include "Small island" , "Skye or Capri?" , "Prince Edward perhaps" , "description of Britain" , "Christmas or Easter, perhaps" .)