Try again? (6)
'try again?' is the definition.
('hear' can be a synonym for 'try' so perhaps 'rehear' is OK for 'try again')
This is all the clue.
(Other definitions for rehear that I've seen before include "Try again (in court)" , "Retry (a lawsuit)" , "Hold the trial again." , "be a sympathetic listener, not for the first time" .)
'try again' is the definition.
('attempt' can be a synonym for 'try' so perhaps 'reattempt' is OK for 'try again')
This is all the clue.
(Another definition for reattempt that I've seen is " Try again".)
'try again' is the definition.
('sample' can be a synonym for 'try' so perhaps 'resample' is OK for 'try again')
This is the entire clue.