Confirmed it's made of squares (7)
I believe the answer is:
checked
This might be a double definition.
'confirmed' is the first definition.
Both the definition and answer are adjectives. Perhaps there's an association between them I don't understand?
'made of squares' is the second definition.
The definition and answer can be both related to change as well as being past participle verbs.
Perhaps you can see an association between them that I can't see?
'it's' acts as a link.
Can you help me to learn more?
(Other definitions for checked that I've seen before include "Patterned with alternating squares of colour" , "Verified, passed inspection" , "Restrained" .)