Too good to be true (7)
'true' is the definition.
Both the definition and answer are adjectives. Perhaps you can see a link between them that I can't see?
'too good to' is the wordplay.
I cannot quite understand how this works, but
'good' could be 'pi' (old-fashioned term for pious) and 'pi' is found in the answer.
'to' is present in the answer.
This explanation may well be incorrect...
'be' acts as a link.
Can you help me to learn more?
(Other definitions for utopian that I've seen before include "I put on a show of perfect kind" , "Citizens of Thomas More's perfect country" , "Perfectionist reformer" , "Idealistic but usually impractical" , "Really ideal in perfect fictional country" .)
(Other definitions for unreal that I've seen before include "fake" , "Dreamlike" , "Lacking in substance" , "Existing only in the imagination, not actual" , "Not factual" .)