Make a mistake (4)
'make a mistake' is the definition.
(slipping up is a kind of making a mistake)
This is all the clue.
(Other definitions for slip up that I've seen before include "Small error" , "one fielder close to the wicket?" , "err" , "Minor inadvertent mistake" , "Make a mistake, on a banana skin ?" .)
'make a mistake' is the definition.
(to err is to make an error)
This is the entire clue.
(Other definitions for err that I've seen before include "Go wrong" , "Make mistake in Canberra" , "Transgress" , "Miscalculate" , "Make a wrong move" .)
(Other definitions for bungle that I've seen before include "Make a mess of" , "Do something carelessly or badly" , "[BEAR]" , "Badly handle" , "(Make an) embarrassing mistake" .)
'make a mistake' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for goof that I've seen before include "Foolish mistake" , "Blunder, mistake (slang)" , "In slang, bungle or blunder" , "foolish error" , "(Make a) silly mistake" .)
'make a mistake' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for mess-up that I've seen before include "Muddle, bungle" , "Handle (something) ineptly" , "Go wrong -- create disorder" , "Ruin" , "Fiasco" .)