Went up (6)
'went up' is the definition.
(scaling is a kind of going up)
This is the entire clue.
(Other definitions for scaled that I've seen before include "Climbed - peeled off" , "like a snake" , "Surmounted" , "Climbed, or removed fish flakes" , "Cleaned fish" .)
(Other definitions for grew that I've seen before include "Became larger" , "Expanded - flourished" , "Cultivated'" , "Developed, matured" , "Increased in size" .)