Support Harry meeting the Queen in person (8)
I believe the answer is:
teenager
'person' is the definition.
(teenager is a kind of person)
'support harry meeting the queen' is the wordplay.
'support' becomes 'tee' (tee is a kind of support).
'harry' becomes 'nag' (both can mean to consistently bother).
'meeting' is a charade indicator (letters next to each other).
'the queen' becomes 'ER' (abbreviation for Elizabeth Regina).
'tee'+'nag'+'er'='TEENAGER'
'in' is the link.
(Other definitions for teenager that I've seen before include "hormonal problem?" , "14, perhaps" , "Young person" , "Generate (anag)" , "Youngster" .)