Appear again (9)
'appear again' is the definition.
('surface' is an answer for 'appear' so perhaps 'resurface' is OK for 'appear again')
This is the entire clue.
(Other definitions for resurface that I've seen before include "Put a new coating on" , "Bob up" , "Come back up to the top of deep water" , "Recover" , "Once more appear" .)
'appear again' is the definition.
(synonyms)
This is all the clue.
(Another definition for re-emerge that I've seen is " Come out again".)