Always welcoming German with cordiality (5)
I believe the answer is:
amity
'cordiality' is the definition.
(synonyms)
'always welcoming german with' is the wordplay.
'always' becomes 'ay' (archaic term for 'always').
'welcoming' is an insertion indicator (in sense of 'inviting in').
'german with' becomes 'mit' ('with' in German).
'ay' enclosing 'mit' is 'AMITY'.
(Other definitions for amity that I've seen before include "Friendly feeling, fraternity" , "Friendliness" , "Cordial friendship" , "warmth" , "Cordiality" .)