Press group returning from Pakistan or India (4)
I believe the answer is:
iron
'press' is the definition.
(ironing is a kind of pressing)
'group returning from pakistan or india' is the wordplay.
'returning' says the letters should be written backwards.
'group' indicates a hidden word (I've seen 'group of' mean this (group of letters from the clue)).
'nori' can be found hidden inside 'from pakistan or india'.
'nori' reversed gives 'IRON'.
(Other definitions for iron that I've seen before include "Former dividing line across Europe" , "Metallic element, symbol Fe" , "Wellington was known as the .... Duke" , "Flatten; element" , "Magnetic metallic element" .)