Flub (3)
'flub' 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 "Slip up" , "Stray from the straight and narrow" , "Go wrong" , "Make a wrong move" , "have an affair?" .)
'flub' is the definition.
(I know that fumble is a type of flub)
This is the entire clue.
(Other definitions for fumble that I've seen before include "Grope clumsily" , "Grope around" , "Handle something awkwardly" , "Mishandle" , "Handle awkwardly, grope about" .)