Foul up (3)
'foul up' is the definition.
(both can mean to blunder)
This is all the clue.
(Other definitions for err that I've seen before include "Miss the mark" , "Be mistaken" , "Go wrong" , "Leave the straight and narrow" , "have an affair?" .)
'foul up' is the definition.
(synonyms)
This is all the clue.
(Other definitions for botch that I've seen before include "Spoil by clumsy work, make a hames of" , "Carry out (task) badly" , "Mend clumsily" , "Spoil through clumsiness" , "mistake" .)