Area of France that's near Luxembourg and Germany (5)
I believe the answer is:
field
'area' is the definition.
(someone's area of expertise)
'france that's near luxembourg and germany' is the wordplay.
'france' becomes 'f'.
'that's' becomes 'ie' (abbreviation for 'id est', 'that is' in Latin).
'near luxembourg' becomes 'l' (international vehicle registration code. I am not sure about the 'near' bit.).
'and' is a charade indicator (letters next to each other).
'germany' becomes 'd' (vehicle registration code for Deutschland).
'f'+'ie'+'l'+'d'='FIELD'
'of' is the link.
Can you help me to learn more?
(Other definitions for field that I've seen before include "Pasture or crop land" , "Crop land; catch (ball)" , "Piece of land for crops, pasture etc" , "Area of farmland" , "Realm" .)