One company with northern image (4)
I believe the answer is:
icon
'image' is the definition.
(I know that image can be written as icon)
'one company with northern' is the wordplay.
'one' becomes 'i' (Roman numeral).
'company' becomes 'co' (abbreviation).
'with' says to put letters next to each other.
'northern' becomes 'n' (abbreviation e.g. N. Ireland).
'i'+'co'+'n'='ICON'
(Other definitions for icon that I've seen before include "Coin (anag)" , "Figure of Christ in Eastern churches" , "item on the menu" , "Religious painting in Greek Orthodox Church" , "Religious painting or symbol on computer screen" .)