Man friend suitable for a queen (7)
I believe the answer is:
royally
'suitable for a queen' is the definition.
I can't judge whether this defines the answer.
'man friend' is the wordplay.
'man' becomes 'roy' (I've seen this before).
'friend' becomes 'ally' (an ally is a friend or supporter).
'roy'+'ally'='ROYALLY'
Can you help me to learn more?
(Other definitions for royally that I've seen before include "in splendid fashion" , "With magnificent style" , "Grandly" , "Utterly" .)