I do it wrongly, in charge, being foolish (7)
I believe the answer is:
idiotic
'foolish' is the definition.
(thesaurus)
'i do it wrongly in charge' is the wordplay.
'wrongly' indicates anagramming the letters.
'in charge' becomes 'ic'.
'do'+'it'='doit'
'doit' with letters rearranged gives 'diot'.
'i'+'diot'+'ic'='IDIOTIC'
'being' is the link.
(Other definitions for idiotic that I've seen before include "Witless" , "without any point" , "Senseless" , "Silly" , "Fatuous" .)