Certainly didn't reveal some fresh ideas (3)
I believe the answer is:
hid
'certainly didn't' is the definition.
I can't judge whether this definition defines the answer.
'some fresh ideas' is the wordplay.
'some' indicates the answer is hidden within the clue (some parts of the word are used).
'HID' is hidden within 'fresh ideas'.
'reveal' is the link.
Can you help me to learn more?
(Other definitions for hid that I've seen before include "Concealed (oneself?)" , "Stayed out of sight" , "Shrouded" , "Took cover" , "Concealed in orchids" .)