Introduction is formal meeting the Queen (6)
I believe the answer is:
primer
'introduction' is the definition.
(I've seen this before)
'formal meeting the queen' is the wordplay.
'formal' becomes 'prim' (I've seen this in other clues).
'meeting' is a charade indicator (letters next to each other).
'the queen' becomes 'er' (Elizabeth Regina).
'prim'+'er'='PRIMER'
'is' is the link.
(Other definitions for primer that I've seen before include "Introductory textbook or first coat of paint" , "He charges" , "small book of prayer" , "Sealant coat" , "Initial coat of paint" .)