Ideas, even if offered by witless twits (8)
I believe the answer is:
thoughts
'ideas' is the definition.
(I know this)
'even if offered by witless twits' is the wordplay.
'even if' becomes 'though' (I've seen this in another clue).
'offered by' says to put letters next to each other.
'witless twits' becomes 'ts' (I can't explain this - if you can you should give a lot more credence to this answer).
'though'+'ts'='THOUGHTS'
Can you help me to learn more?
(Other definitions for thoughts that I've seen before include "Ideas, musings" , "They are in my mind" , "Cogitations" , "Ideas, reflections" , "Notions" .)