Wine and dine with what's on plate and beer (6)
I believe the answer is:
regale
'wine and dine' is the definition.
(thesaurus)
'what's on plate and beer' is the wordplay.
'what's on plate' becomes 'reg' (a number plate shows a car's registration number).
'and' means one lot of letters go next to another.
'beer' becomes 'ale' (I've seen this before).
'reg'+'ale'='REGALE'
'with' is the link.
(Other definitions for regale that I've seen before include "Supply copiously" , "Amuse with stories" , "Entertain lavishly" , "Shower" , "Feed or entertain well" .)