Gallery constructed in a royal manner (7)
I believe the answer is:
regally
'in a royal manner' is the definition.
I can't judge whether this defines the answer.
'gallery constructed' is the wordplay.
'constructed' is an anagram indicator.
'gallery' is an anagram of 'REGALLY'.
Can you help me to learn more?
(Other definitions for regally that I've seen before include "In monarchical manner" , "Like a monarch" , "How head of state appears" , "Largely in royal manner" , "as befits monarch" .)