Baking a mini-bagel is conceivable (10)
I believe the answer is:
imaginable
'is conceivable' is the definition.
(synonyms)
'baking a mini-bagel' is the wordplay.
'a mini-bagel' can be anagrammed to 'IMAGINABLE'.
Though, I'm not clear how the anagram is indicated.
Can you help me to learn more?
(Other definitions for imaginable that I've seen before include "likely" , "Possible" , "Not beyond thinking" , "may be fancied" .)