Henry returns with a mineral from a Pakistan city (6)
I believe the answer is:
lahore
'a pakistan city' is the definition.
(I've seen this in another clue)
'henry returns with a mineral' is the wordplay.
'henry' becomes 'hal' (short for Henry).
'returns' says the letters should be written backwards.
'with' says to put letters next to each other.
'a mineral' becomes 'ore' (ore is a kind of mineral).
'hal' backwards is 'lah'.
'lah'+'ore'='LAHORE'
'from' is the link.
(Other definitions for lahore that I've seen before include "Oh, real city of Pakistan" , "Pakistan's second city" , "Lo, hear about Indian city" , "City in NE Pakistan" , "Heal or go out to the Pakistani city" .)