Clever as a gallery? (6)
I believe the answer is:
artful
'clever' is the definition.
(similar in meaning)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for artful that I've seen before include "Clever, tricky" , "Dickens boy, an . . . . . . Dodger" , "Crafty like Dicken's Dodger" , "Giving a false appearance of frankness" , "Clever like Dickens's Dodger" .)