Agree with ideas for reconsideration (6,8)
I believe the answer is:
second thoughts
'reconsideration' is the definition.
(I've seen this before)
'agree with ideas' is the wordplay.
'agree with' becomes 'second'.
'ideas' becomes 'thoughts' ('thought' can be a synonym of 'idea').
'second'+'thoughts'='SECOND THOUGHTS'
'for' acts as a link.
(Other definitions for second thoughts that I've seen before include "revised opinion" , "Change of opinion possibly" , "Doubts; reconsideration" , "change of plan" , "Revised view" .)