Goof (4)
'goof' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for err that I've seen before include "Make a wrong move" , "Leave the straight and narrow" , "Go wrong" , "Drop a clanger" , "Bungle" .)
'goof' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for slip that I've seen before include "Gaffe" , "release > voucher" , "Fail < to engage gear" , "Mistake (of tongue or pen)" , "Slight error" .)