Cordial and welcoming one visit (7)
I believe the answer is:
aniseed
'cordial' is the definition.
The definition and answer can be both things that one consumes for nourishment as well as being singular nouns.
Maybe you can see an association between them that I can't see?
'and welcoming one visit' is the wordplay.
'welcoming' indicates putting letters inside (in sense of 'inviting in').
'one' becomes 'i' (Roman numeral).
'visit' becomes 'see' (synonyms).
'i'+'see'='isee'
'and' enclosing 'isee' is 'ANISEED'.
Can you help me to learn more?
(Other definitions for aniseed that I've seen before include "Liquorice flavouring, used in cookery" , "Flavouring herb" , "Flavouring in pastis" , "Liquorice flavour" , "taste of Pernod, perhaps?" .)