Whereas sessional members can have second thoughts ... (8)
I believe the answer is:
reassess
'members can have second thoughts' is the definition.
I can't tell whether this defines the answer.
'whereas sessional' is the wordplay.
'REASSESS' is hidden in amongst the letters.
However, I'm unsure how this is indicated.
Can you help me to learn more?
(Other definitions for reassess that I've seen before include "size up again" , "Re-evaluate" , "Test again" , "Estimate value once more" , "Rate afresh" .)