Long for Henry to meet queen (6)
I believe the answer is:
hanker
'long for' is the definition.
(I've seen this before)
'henry to meet queen' is the wordplay.
'henry' becomes 'hank' (short for Henry).
'to meet' is a charade indicator (letters next to each other).
'queen' becomes 'ER' (short for Elizabeth Regina ie Queen Elizabeth).
'hank'+'er'='HANKER'
(Other definitions for hanker that I've seen before include "Long, ache" , "Crave, feel a longing" , "Feel a longing, yearn" , "Have longing or yearning" , "Long, yearn" .)