Think about again (10)
I believe the answer is:
reconsider
'think about again' is the definition.
('consider' is an answer for 'think about' so perhaps 'reconsider' is OK for 'think about again')
This is the entire clue.
(Other definitions for reconsider that I've seen before include "Nice orders ( anag.)" , "Think again" , "Have second thoughts" , "Ponder further" .)