One dining getting attention, welcoming note? (5)
I believe the answer is:
eater
'one dining' is the definition.
(someone eating a meal)
'attention welcoming note?' is the wordplay.
'attention' becomes 'ear' (having someone's ear is having their attention).
'welcoming' means one lot of letters goes inside another (in sense of 'inviting in').
'ear' going around 'te' is 'EATER'.
'getting' acts as a link.
(Other definitions for eater that I've seen before include "Type of apple" , "Apple, perhaps" , "diner" , "Fruit (but not a cooker)" , "type of fruit" .)