Occupier of temporary shelter outside centre of Gdansk (6)
I believe the answer is:
tenant
'occupier' is the definition.
(tenant is a kind of occupier)
'temporary shelter outside centre of gdansk' is the wordplay.
'temporary shelter' becomes 'tent' (I've seen this before).
'outside' indicates putting letters inside.
'centre of' says to take the centre.
The central letters of 'gdansk' are 'an'.
'tent' placed around 'an' is 'TENANT'.
'of' is the link.
(Other definitions for tenant that I've seen before include "one paying rent" , "Anne Bronte's novel 'The ...... of Wildfell Hall'" , "Lessee" , "Occupant of rented property" , "Rent-payer" .)